Once I had to force checkmate with King, Knight, and Bishop against a lone king. My opponent did NOT believe in me, and was nonetheless disappointed. More recently, I had to hold the draw with a protected rook pawn on the 7th rank against a lone queen.
Again, the purpose of knowing rare endgames is to be able to salvage draws with creative play, and to make it harder for your more creative opponents from swindling draws from you.
I had my e-pawn vs two knights. My opponent didn't want to suffer driving my king into a corner and offered a draw. And I don't know why all the engines in the world say the stronger side wins in positions like that.
You can't checkmate with 2 kights.