I'd be surprised if there were 15 names within your filter (1100+ Scrimmage yards, 10+ TDs, FA year). Even if there were 50, and all of them got $25 million, the point remains that just because other teams are making stupid spending decisions doesn't mean that we need to or should.
If someone wanted to pay James Conner a big contract, you thank them very much and collect the comp pick the next year.
If everyone is making the same decisions it's not stupid, it's normal. And it's your definition of stupid that's wrong.
I mean, seriously? Not a single NFL GM is doing what you suggest but you're right and all of them are stupid? Jeez.
Let's have a look at some recent examples.
Kenyan Drake in '21 coming off 1092 scrimmage yards and 10 TD's got 5.5m a year vs a $182.5m cap so 3%.
Melvin Gordon '20 coming off 908 yards and 9 TD's (over 12 games) got $8m a year vs a $198.2m cap so 4%.
Tevin Coleman in '19 coming off 1076 yards and 9 TD's got $5m a year vs a $188.2m cap or 2.65% of the cap but had shared a backfield his whole career and was signed to do the same.
Dion Lewis in 2018 coming off a 1110 yard 9 TD season got a 4 year $19.8m deal of which he played 2 years and earned $10.3m. The 2018 cap was $177.2m so $5m was 2.82%. And Lewis was really just a 3rd down back.
Lamar Miller in 2016 coming off 1269 yards and 10 TD's signed for $6.5m per year vs a $155.3 cap or 4.2%.
I could go on and on and I will never find a RB getting paid what you suggest following a season like any of these guys.
For the record Conner is getting 3.36% of the cap this year which is bang in line with history and for that he will give us 1150 yards from scrimmage, which I think is fair. At a higher YPA than last year despite playing behind about 10 different IOL.