Endermen spawn rates in Nether

I think that you should lower the spawning rates of endermen in the nether, it sort of breaks game progression .I'll explain. At the current rate they spawn, you can farm about 20 to 30 Pearl's in your first night there. That just rockets you to the end. Not to mention in the warped biome, this becomes even more plentiful and available. It significantly trivializes one of the stages of progression.why barter when you can build a 3 by 3 above your head and cut down 50 enderman?