The number of people that think Starlink will work with a lot of subscriptions in densely populated cities is too d@mn high.
Even Elon said it. Maybe 1% can drop their fibre for starlink. Starlink does about 20Gbps per 400 Sq km today. Yes it will get higher. And maybe even order of magnitudes higher. But even then it won't be optimal for densely populated areas.
If you got fibre, keep fibre...
All other internet services are only useful either where there is no fibre availability, or as backup.