But there individuals, that became champions or have a title fight in just 3-4 fights. And they start their journey unranked. Look how I see current situation. Take any lightweight or lower division. There are fighting tiers. Champion-top6, top7-top15, rest of division. And these guys fight between each other all the time only. If you are a good fighter, maximum you would achieve is being among "rest of division". Maybe Gods of random be kind to you, and someone from top15 will withdrew from fight due to injury and Gods will be double kind to you and you would be selected by match makers.
As you said, there are fighters that get title fights in only a few fights, what differentiates them from those who can't break into the top? They're good. I don't think there are any fighters ranked in the 7-15 tier with consistently good performance and on winning streaks that would stay in that tier for too long. So if we have fighters in that 2nd tier with a mix of wins and losses, they don't really deserve a title shot, and nobody from the top tier would want to fight them as there's nothing to win and there's no money to be made there.
As for the lightweight, we had Fiziev (2nd tier) fighting Gaethje (1st tier) now Tsarukyan (2nd tier) is fighting Dariush (1st tier) (which I see as a 50/50 match). Gamrot will likely get a chance to fight someone from the top 5 (perhaps Oliveira). So I don't think it's all that bad.