Seem?
Apple does this across all its product line-ups. It couldn't be more obvious.
The exact same reason why there's no Face ID in iPad Air, no Thunderbolt, no four-speaker model, no high-end Magic Keyboard.
This is a basic premise of Apple products, how is anyone second guessing the intentions behind these glaring differences in the different product tiers?
You also think no Pencil 2 or Pencil Pro support on 10th Gen. iPad "seems" like something Apple does to get you to spend more on an Air or Pro?
There's no guessing. It's as apparent as it can be.