Knowledge gets distorted over time, it’s important for a small group of people to preserve and uphold the wisdom.

Also, one thing that’s interesting is that every couple hundred or thousand years different spiritual leaders come on the planet and give the knowledge that’s needed to those people at that point in time.

Krishna 5k years ago, Buddha 2.5k years ago, Jesus 2k years ago, adi shankara 1300 years ago, etc. the knowledge each of them gave had a different flavor because society was different at those times.

Anyway I’m agreeing with you, I’m just pointing out this is inevitable and more spiritual teachers will come and continue to help people.

At least this is my favorite theory (I don’t take this stuff too seriously either, it’s just fun to think about)