ranked ahead of an 11-win team from a power conference in the CFP selection committee rankings at the end of the season - so to say that CFP NY6 selection supports that viewpoint is 100% incorrect. In fact, CFP NY6 selection actually supports the exact opposite of what your argument is.

A 9-win team from the SEC/B1G will almost certainly not make the playoff over an 11-1 or 11-2 team from the B12 or ACC. It's possible they could get in ahead of a 10-2 or 10-3 B12/ACC team if the SOS for the B12/ACC team ends up being poor - but historically that has very seldom happened and has generally only been the case when the 10-win team didn't have any quality wins (i.e. Washington State in 2018 who had 0 top 25 wins).