Years ago, you probably had an argument. Years ago, I made the same argument. When's the last time you investigated Linux? The fact you think there's some momentous overhead in learning or managing Linux tells me it wasn't recently.
Oh, I won't debate that it has gotten orders of magnitude better since I did a fair bit of work with it (both professionally and personally). As I think I mentioned earlier, while I've never considered myself a Linux expert, I did manage a rack of machines for a near Fortune-50 for almost a decade, and had a MythTV box at home.
It was really not easy back then, while yes, an amateur could install and get running such a system today. However, once you have to do something besides something very basic, it quickly gets quite ugly.
And, as a matter of fact, I installed Ubuntu just a few weeks ago on Parallels in an attempt to see if I could get my eGPU folding with Folding@home. I probably spent about 4 hours mucking with it before I gave up.
I was quite impressed how easy it was to get setup, and there were quite a few basic tools there ready to roll. But, once you try to do anything outside that, you're having to understand package managers and command lines.
It's kind of like Windows, but Windows has hidden the mess even better these days. You can now do quite a bit on Windows without realizing what is going on 'under the hood' but once you hit that point, it is still kind of a mess.
That mess is also there on macOS, but it is really well hidden, such that all but the most technical of users will likely never encounter it. As far as things have come, Linux gets into the technical-requirements way more quickly, and at a point that almost anyone beyond surfing and word-processing will quickly encounter.
The person I responded to was saying he had to learn new software no matter what. I don't know what tools he currently uses, any more than you do. There's every reason to believe he will find adequate tools on Linux, and I suggested he investigate and make that determination for himself. I was encouraging the person to make an informed choice after they expressed a problem different from what you've articulated. Why is making informed decisions a bad thing?
I find it greatly amusing that Mac users today feel far more threatened by people switching to Linux than they ever were by people switching to Windows. Nobody bats an eye at the constant posting of frustrated Mac users announcing they've had it with Apple and they're going to Windows anymore, but if somebody even mentions Linux people come out of the woodwork to tell them they're wrong, all using the same tired old arguments I used to hear in the freaking 90s (back when those arguments had validity). Is the non-Windows marketshare a zero sum game in your mind? Maybe it is, but from my perspective Linux has the best shot at breaking the Windows monopoly. As it gains marketshare, it encourages more developers (who are already inclined to like Linux) to develop using cross-platform technologies which can only benefit Apple (to the extent that they embrace those technologies instead of their recent trend of pushing their own proprietary stuff).
I think what I bolded is the point I'd question. I suppose it is possible some company makes a tool with similar functionality. But, you're way more limited in choice, especially in terms of commercial products. Years ago, I attempted to use tools like GIMP instead of Photoshop, until apps like Pixelmator came along. It was not an a good experience. I feel the same way every time I try to use Linux.
As much as I'd like to go there, it's a similar reaction to when I use Windows, just more magnified.
There's no threat to people going from Mac to Linux (or even Windows) to me. I just want them to be informed on what they might be facing.
I’m not getting the logic. MacBook will likely get a more capable processor one day. And that is a problem exactly why?
I think the problem is more the OS. People who feel the OS is degrading (and I somewhat include myself in that category) eventually won't care (if the trend continues) how fast the hardware is. Apple needs both.
That said... as I was just explaining above... where else would they go? I suppose if Windows and Linux keep improving and Apple keeps degrading, eventually the lines will cross. But, the reality is (despite how much some of us complain) the gap is still pretty big.
Before Apple made some of the hardware moves over the last few years, I was almost at that jumping point myself. Had Apple not addressed some of the issues, I might have made the move (as I'm technically capable, as much as I'd not have enjoyed aspects of it). Outside of those years (mid-2010s) I mostly criticize Apple in hopes of some course-change and fixes.