I think yes but to an extend. If you never buy players (nor train yours a lot) and just always promote youth players, you will eventually have a very low % squad and therefor also get drawn with easy and inactive opponents.
If you then are an active player you will win vs these teams. I don't think you can win many (if any) titles with this kind of strategy but Top 8 placement in league should be possible to achieve every season to promote again. Would be a fun experiment.