I imagine it's to do with price, at least for public toilets.

Here in the UK , we can't have nice things because someone will just take the liberty of smashing it to pieces for you.

For what I have heard about places like Tokyo; you have vending machines for just about all of your needs, fancy toilets and video game arcades have actual chairs to sit on while you play the machines.

None of these things would last 5 minutes in the UK.