This is particularly criticized because it negatively affects the team right now. Bring this up in 2018 when Dallas won the East at 10-6 and wildcard Seattle was 10-6 with a head-to-win win against Dallas, and suddenly Dallas is now the away team visiting Seattle in the first round.
Consider a 24-22 Dallas victory potentially flips around with the 3 point home field advantage Vegas betting line, and the response here would be “Why didn’t we get a home playoff game, we won our division and they did not. This is criminal!”