You are already spending $800 for the 16; the 16 Pro is $200 more and you get better camera, better battery life, and slightly bigger screen. It is a tempting proposition if you want the new tech. If you don't care about latest/greatest get the SE at 1/2 the price.
This is apples strategy across the whole of their product portfolio.
Make a cheaper crippled base device, and a model with higher specs just within reach of that price so that most people will upgrade because 'why not?'.
If they just made the base model have half decent specs, a lot less people would upgrade to the higher end models.