AppleTalk was there in every Mac - and was replaced by USB in the end.
FireWire was there in every Mac - and was replaced by USB in the end.
Lightning is now introduced
Thunderbolt will be there in every Mac - and will be replaced by ... guess what.
My statement is that the peripheral endeavors of Apple always have been not long lasting. There is little indication this will change in the future, based on the introduction of new proprietary connectors and standards.
On the other hand Apple has been quite successful when extending on existing standards, without breaching compatibility. Ethernet, WiFi and GSM card to name just some examples or the new Fusion Drive.
Claiming that everyone would own an iOS device in future is an foolish exaggeration, honestly.
We should learn from the past. Not just blindly hope for the best (which would be faulty, most likely).
I really don't understand why you're having such difficulty understanding basic economics. Are you a vendor? I really hope not for your sake. Look, I'm not disputing what you're saying about Apple's Mac-based proprietary ports. You're likely right.
But.
To apply the same view to iOS devices? Unless you've been living a very sheltered existence, iOS devices present an astronomically larger portion of their markets than Macs do within the PC market. Music players & tablets... these markets have been nailed by Apple, and the iPhone grows every year. This means that the percentage of people using iOS phones, music players and tablets proportionately dwarfs the percentage of people using Macs for their computing uses. If I have to explain this even simpler, this means that more people own, use, and buy iOS devices than Macs. What does this mean? It means that, in comparison, more houses and places of work will have devices with lightning ports over the next few years than in all possibility the entire sum of users of those older ports you've mentioned? Why? Again, because iOS devices are more available than Macs. You'll be hard pressed to find someone who doesn't own, hasn't owned, intend to own an iOS device. The same cannot be said for Macs. Add to the mix that the lightning port ISN'T AN ADDED CONNECTIVITY PORT - it's the SOLE MEANS of charging the device, and I fail to see how you cannot be more wrong in your outlook. Even if everyone who owned an iOS owned a Mac, there'd be no need to also own or use a Thunderbolt cable.
Are you thinking that people will instead not adopt lightning? They will stick to their legacy devices as technology marches on? Or that they will upgrade and fork out for adapters for the next ten years? Of course not. The lightning port isn't some optional extra one can take or leave. Buy an iOS device, you're locked in. How can you even compare something like Thunderbolt to that? Thunderbolt is really only of value to video editors who need high speed connectivity. That's about as far away from the needs of the common iOS user as it gets. On the other hand, lightning is the new standard, working in conjunction with USB.
Sorry, didn't mean to rant. Maybe you're thinking lightning is a lightning to lighting cable, or something? It's to USB, thus poses no problem at all to anyone.
TL/DR:
Apple are replacing one proprietary cable with another. Nothing more.