Personally, I have two machines running Catalina, a 2012 MacBook Pro and my 2016 MacBook Pro. I am fortunate to have more than a single Mac that allows me to do that and not have to use Catalina on a critical work-related (i.e my money makers) machine. For those with a single Mac, they absolutely should be waiting for the six months as you suggest or even longer depending on what they do with their Mac.
In another thread, someone noted that they had upgraded their editing rig and were having issues and needed help. I am not a 100% sure that they were serious or joking, but I find it a bit disconcerting that users aren't more wary of updating their Mac without waiting to see what nasty bugs may present themselves by early adopters. The Public Beta cycle has enabled some of that risk taking because there is a segment of people who absolutely have to have to newest and shiniest, no matter what.
Although iOS has had its up and downs, it has been seemingly more stable and definitely more maintained and updated quickly due to sheer volume of installs, whereas macOS has a much smaller base and Apple has not taken the time to ensure it is as polished and reliable out the door from one release to another. To me, this all began with MacOS X Lion and has gone through ups and down of reliability or lack thereof, which is disheartening for those whose primary workload and flow is dependent on a desktop computer. Without waxing philosophic for too long, I have no problem with Apple's focus on the iPad as a traditional desktop/laptop replacement, I am embracing that myself, but we're still not there and macOS is still a beloved and vital component to many users daily experience. Limiting hardware choices is one thing, but not being respectful of the user base and its needs with respect to the operating system is an offense, given that you want us to entrust our data to these not inexpensive devices. Apple needs to do better with macOS engineering overall because no matter what hardware is running it, that's why we come back to Apple. Not the "amazing" hardware, but for the simplicity and power of macOS. No matter how hard Apple wants that to be refocused to iPadOS now, they need to make sure that understand that we will go when we're ready and not before. Especially since they are still actively selling, creating and marketing hardware to the general public. macOS should be bulletproof...end soapbox or rant or whatever it may be called.
Last bit - Catalina is a sea change in a lot of ways and it sets things up for the next 10 years or so, but Apple has done a fairly horrible job in communicating that to anyone but developers...at least that's my opinion. They really don't evangelize macOS and as such it is treated like an afterthought when compared to iOS and iPadOS. Apple does a lot of things right, but keeping the zeitgeist of macOS and the Mac as co-equal to the iPhone and iPad is sure as hell not one of them.