If people feel strongly enough that the name is not accurate, they will have to buy a competing product that fulfills their needs at the price they are willing to pay.
I suppose what would be interesting, but highly proprietary, would be Apple's marketing research information on how the "Pro" marketing term is received by their target consumers.
All that being said, I personally have never bought from Apple, and think the $150 upgrade cost is ridiculous (not to mention the $300 jump from the XR, which is still $300 more than I paid for my Pixel)! So I could say the "Pro" marketing isn't working on me! But overall, they aren't hurting for customers.