Sure, but how many things changed since? For one, back then there were a lot fewer mobile gamers.
GPU numbers back then were much higher due to being more necessary on the lower end even for non gaming PCs. If you look at the general trend line you'll see the decline coincides with Intel beginning to put more effort into their IGP (starting in 2011 with Sandybridge).
It also tracks with a general decline in PC shipments with the rise of mobile/tablets. With gaming there is also the growth and larger cross over with the console space which started to occur during the 7th gen, and firmly with 8th gen console releases. There is a reason why the discrete GPU market has shifted upwards, the bottom end simply is being served elsewhere.
There is also the issue in general that PCs simply last longer from an actual functional stand point. This is an issue a lot of enthusiast discourse seems to not account for. The general buyer doesn't really care about generational improvements, they care and buy if they have an actual functional need that needs to met, as in their existing GPU/PC/whatever has problems doing what they want to do. Enthusiasts are the ones that are buying because the new product is X% faster. The general buyer buys if their games aren't running well in not clearly defined sense.
In terms of the last point this is why I disagree to some extent with the notion that people are brining up that PC gaming has gotten more expense and less accessible. The enthusiast end has moved up market but general accessibility is actually higher. But this seems typical of when an hobby becomes more mainstream and mature.
Let's look at say ~$500 GPUs. How well did Fermi (GTX 470/480/570/580) "high end" GPUs age into the PS4 era versus how well "mid range" Turing (2060S/2070/2070S) will age into the PS5 era?
This does result in a catch 22 from the business stand point of lowering margins to chase sales. The problem is if everyone adopts current gen GPUs, how many will want to move up to next gen GPUs? A $500 hypothetical RTX 4070ti 12GB that everyone buys also effectively all those buyers have no actual need to upgrade until we move past this entire console generation (with some estimates at 2028).
Edit: Enthusiasts on forums like this might not feel these cards are acceptable, but in reality the yare usable for PC gaming. 4070ti, 4080, 4090 or 7900xt/xtx class cards are not needed for PC gaming. -
Even if you want console parity well the 6700XT is PS5 equiv or better in every aspect -
https://pcpartpicker.com/products/video-card/#T=10&sort=price&P=6442450944,51539607552&c=501
The idea that PC gaming in its entirety has been gated to $1000 or more GPUs simply is not reality.