To be honest I ain't bother. FTTC are more than enough for everyones in UK. Why need faster speed? I know I am on G.fast but will downgraded to FTTC 40/10 next year because I will be on my own. Don't need faster speed anymore as it getting bored now for me.

You forget three things:
1. Not everybody is in FTTC footprint.
2. Not everybody who is in FTTC footprint can get even 40/10 speeds.
3. Not everybody uses the Internet for the same purposes that you do.

Therefore, it's fine to say "FTTC is more than enough for adslmax". It's not fine to say "FTTC are [sic] more than enough for everyones [sic] in UK"

Having just switched to 500/75 FTTP from FTTC (got full 80/20) it is a huge improvement and makes me so much more productive. Of course there will always be people who only need slower connections. But families of 4 with people also often working from home a few days FTTP is hugely beneficial.