That is a very good point and I think something that would make things much more difficult in the event of spacex/starlink failure and acquisition. Their entire architecture is predicated upon producing their own satellites in bulk, cheaply, launching replacement regularly using re-used falon9 first stages at a (relatively) low $/kg launch cost. As a vertically integrated single company.

If you had to break that up in a scenario where spacex no longer existed and there were no more re-used first stages, it could cost considerably more. And also cost considerably more if a third party had to be paid to manufacture and QC the satellites.