what is the point?

[biketool]

A dumb phone cannot browse the web, check e-mails, look up public transport schedules, show maps, etc. The PinePhone can do all that, and I do all that with it regularly.

There are also plenty of fun stuff I can do with the PinePhone that I cannot do with a dumb phone. I can even SSH into it. Or from it.

I cannot run Android or iOS apps on my PinePhone, but neither can I on a dumb phone.

As for power consumption, I simply always carry a power bank, and as soon as I come home, I plug the PinePhone back in (and also recharge the power bank if I had to use it).

As much as it dirties the hands you can use waydroid, I understand you can even have a chroot boot along with your system to have a reasonably fast response as if the android apps were running as native.
I only briefly experimented with waydroid using a allwinner pinephone where it was unsatisfactory but the PPpro or a future RISC-V phone would probably have enough power.