Whilst I agree with the sentiment, I'm not sure the naming makes much difference in practice. If the service people have today is good enough for their needs, why would they switch to a better service - especially if it means they have to pay more?
Lack of support from budget ISPs is a problem. If you're paying £22 per month for FTTC on Plusnet or Talktalk, you're going to stick. Plusnet don't offer FTTP at all, and Talktalk only offer expensive ultrafast packages without voice service. (This may change if they join up to Equinox)
It's a bit different for BT, who charge the same for FTTC and FTTP. They can easily move people over to FTTP at contract renewal time: "good news! when you renew with us, we'll upgrade you to FTTP! No extra charge, and you'll get the full speed you pay for! Blah blah blah." If there are BT customers who stay on FTTC even when FTTP is available, only BT are to blame.
no wonder there's little FTTP takeup.
I think the OP was making the opposite point: that the Ofcom-claimed FTTP takeup of 25% is higher than they expected.