Anyone using that logic is wrong.
I know that, just the fact that someone is really successful with a method doesn't necessarily means that the method is better. Sadly in cubing it's really hard to analyze what's better than cfop because cfop has been optimized and perfected over the last 40 years and most of the world-class speedsolvers have put years into cubing using cfop.
Back in 2009 for example fingetricks, algs and turning style were different, I remember the first person to upload a video with all the PLLs under 1s (
Breandan Vallance), that year the WR avg was just above 10s. Feliks got a sub 10 avg the next year, that was a long long time ago and he's still rank 1 in the world, after 10 years practicing the same method, adding more stuff to it, optimizing his solutions, etc.
In order to find a method better than roux/cfop you'll need a lot of people willing to spend many many year optimizing a method, finding the best algs for it, adjusting turning styles, creating a recognition system, etc. Just think about all the people that have worked in cfop over the years to make it a "good" method, we needed a lot of people creating good algs, good recognition methods, finding different ways of solving the last pair to skip OLL, finding different ways of solving OLL to skip PLL, finding hundreds of 1LLL solutions, etc, the list goes on and on.