Because having games designed to run on legacy platforms is simply amazing. Check out what some devs have been developing for the Mega Drive, it's absolutely mind blowing to see people pushing the hardware limits almost 40 years later.

Do you really need the pro? I mean, I got a 2nd hand Pixel 8 for a little under $450 last month and am perfectly happy with it (my last phone was a OnePlus 7t). It will get the same support as the Pro for much cheaper...

What I did on my old Oneplus 7t (from a fresh install) was using Shelter to create a work profile and keep anything google related there. On the main profile I didn't sign in to google or installed any google apps. I also disabled all OEM bloatware and apps I didn't use. Not ideal, but better than nothing and all I could do before getting a new phone without unlocking the bootloader.

True, there really is no reason to configure a second phone just to use NFC payments when you can just carry a much smaller card...

I agree with you that there's no harm in releasing them for modern consoles (ou even for the PC), but you can always use emulators anyway.