Or build what you can afford/finance now, and expand later.
There's no technical reason why active fibre can't first be deployed to the node or curb or top of the street first, with PON going down the rest of block/street to begin with. This allows for must of the gains over co-ax and especially DSL.
If Internet use cases ever reach the point where an entire street or floor of an apartment/condo is contending for the full bandwidth of a 25Gb PON fibre run, they can then perhaps split from (say) 1:32 to 1:16, 1:8, etc until each customer gets an individual run.
There's only a finite amount of capital, and spending for individual runs for early deployments may delay other people.
IMHO it will be a number of years before people can regularly saturate >1Gbps, and much longer before 10Gb use-cases start appearing.
As it stands HS-PON (ITU G.9804) can do 50/50, 50/25, or 50/12.5:
* https://en.wikipedia.org/wiki/Higher_Speed_PON
50Gb split by 32, is 1.5625 per customer before contention starts. Are there particular use-cases where a sustained 1.5Gbps (up and/or down) is not sufficient in 2023? Of course it may be possible to burst higher if the rest of the fibre isn't busy. I currently have 1Gb, and software updates certainly come down faster than my previous 25Mb VDSL, and 4K YT videos don't buffer as much. Though I'm not sure if things would be materially different than if I had (say) 'only' 500Mbps.