Indeed. Guaranteed capacity for FTTH in the EU is often 0.1% or so of peak. Consistent with your answer.

I am not sure maximizing throughput to gigabit and beyond is materials efficient though. Fig 33 shows energy efficiency is squarely on the FTTH side anyway: https://europacable.eu/wp-content/uploads/2021/01/Prysmian-s...

A software update completing download in an hour instead of one minute often doesn’t lead to any practical difference. The same number of users is being served but the latter requiring gigabit class CPEs.

Alas it does offer some up selling opportunities. As promoting Cat 6 or even 7 cables to home users.