3 issues with your assessment:
A) GAS has nothing to do with the amount of gear you have either. There simply isn’t 1-2 lenses than can do everything a photographer wants to do. There isn’t just 1 body either.
If you are just taking pictures of kids for memories or taking shots of things around you just for your own sake and can do with 1-2 lenses, then why even have any gear? A phone can do that. A good photographer knows what they need to get the job done, and I guess that means they might be labeled GAS by those that aren’t an avid photographer.
I have three camera bodies, and about nine or ten lenses. I can tell you exactly what each does for me and what purposes they serve. I am sure there are those that wouldn’t know why I would need this or even know when to use what I have, and would think it’s too much. I am fine with that, that differentiates the photographer from the polaroid shooter.
What Canon gear do you have? I see alot of bird shots in flickr (beautiful birds in the Phillipines brw), but then just a random set of what I assume are people you know, various street views, etc. Just shooting birds could be done with 1 lens, but to do it well, that lens is likely very expensive, and then street views can be taken with something like a 24-105.
b) On the flip side, what if all you could afford was 1 body and 2 lenses, and that cost you $10000 to do so? Then in that case, that person doesn't have to worry about lack of support ever, they can just go out and buy new again? I suggest every X years to sell off that gear while there is a market, and replace it with a newer version. In the end that will save money, and has nothing to do with GAS.
c) Who cares if someone likes to collect gear? It isn't anyone's business how one decides to spend their money, especially if they are meeting all their financial obligations while doing so. Any time I find someone complaining about what someone else has, there always seems to be jealousy or envy at play. Be happy with what you have, and learn how to get the most of what you own.
Anyways we aren’t here to cast the GAS dispersions onto others (pun intended), let’s talk about EF and RF lenses. I feel that eventually 3rd party AF RF lenses will exist, Canon wants time to mature and firm up their RF lineup, if they allowed others to start in and manufacture items at lower costs, they will get beat to the punch on some very creative offerings. However, in my case, I have zero issues using adapters, they are so cheap, even the control ring adapter can be found for less than $100, so I will continue to use Canon and 3rd party EF lenses. They work outstandingly on the RF bodies.