Correct. The top teams are going to have 25 plus wins, and typically one of those teams ends up winning it all.
When they changed the logic behind selecting teams on selection Sunday, they went heavily weighted towards the NET rankings. This has only been in the works for a couple years though, which is why you're seeing teams with 18-14, 17-15 records get picked ahead of say a Middle Tennessee State who may have gone 28-3, but didn't play anybody of note, and ended up with a NET ranking in the 50s or 60s.
The problem with this system, in my opinion, is that if a particular team happens to be a member of a top conference, then their NET ranking is going to be pretty good, regardless of wins and losses. WVU is a good example of it this year, and Michigan was last year. It's why the B1G got ten teams into the dance last year. My opinion is that if you cannot win at least 40% of your conference games, then it seems you don't stand much of a chance in the big dance, unless of course, dominos begin to fall in front of you, like they occurred when Michigan went to the championship game in 2018. Higher seeded teams kept losing, enabling Michigan to play lower seeded teams, including Loyola Chicago in the final four.