So if people don't think you're the best, you shouldn't play?
That's not what sports is about...
Being a champion isn't always about being the best. It's about defeating your rivals. Its about finding a way to win.
The college football championship game was developed to name the "best team" of the season.
Prior to the development of the championship game, the best team was determined by polls. But polling proved to be too controversial, especially when one team led one pool and another team led a different poll, leading to co-champions. There were various attempts at having a Championship Game (Bowl Coalition, Bowl Alliance, and Bowl Championship Series) all of which had a single championship game between the top-2 teams. When the BCS was disbanded and replaced by the College Football Playoff, the number of teams involved was increased from 2 to 4.
Maybe the field will be increased beyond 4 in the future. But if so, the purpose of increasing the field will be to help ensure the 2 best teams play in the championship game, not to ensure that everyone gets a fair shot.
If you want to advocate a championship system that isn't about "being the best" but is about deserving teams getting a shot to defeat rivals in a tournament, that is fine. But that isn't compatible with the current system of naming the best.
You are not advocating tweaking the existing system. You are advocating taking the existing system and throwing it out and replacing it with a new system that serves a different purpose. You are certainly allowed to advocate it. But at least recognize that you are advocating a system that serves a different purpose.