TEs aren't typically guys that are reliable any down or distance. You have Kelce, Kittle and a couple others have shown flashes here and there. The Bears also like Kmet a ton, and this style offense doesn't really support 2 receiving TEs. The 12 personnel sets are more for helping with chip blocks or in the run game.
Also, I don't expect Washington to be that type of guy. He's basically a more athletic Marcedes Lewis at this point. Phenomenal blocker and a great athlete, but I don't think he's dynamic at getting open. I think he has more 30-40 catch upside than elite TE level production like 70+ catches.
I see Washington as the type who can threaten the middle of the field at 5, 10, and 15 yards very easily.
He runs really well for a man that size, and is a plus blocker coming out of college. He doesn't have to move like Kelce, he has to have the athleticism to use his incredible size to his advantage, and he does that.
If I had to place my money on it, Kmet and Washington could combine for 120 catches and 1400 yards with Washington's floor. That sounds like a really productive pair, and Washington then has room to grow. I think this offense will have plenty of space to have two TEs on the field in a variety of alignments, because Fields's dynamic talent makes play action and RPO a nightmare to defend.
We're free to disagree, I just wanted to lay my case out as an Amateur Assistant-GM/Professional Bears Fan