You are basically saying 'nobody is allowed to put a boat on this river because I like nature'.
> caution is warranted when making sweeping changes to space that may do any number of negative things, including make future spaceflights more difficult, make ground-based space research impossible
And that why FCC exists and they have mostly agree that this is not actually a problem.
Nobody has a larger intensive not to make future spaceflight harder then SpaceX.
And the idea that all ground-based space research is impossible is equally nonsense that has often been disproven.
Even in your dystopian nightmare, the reality is that within a few years the orbits SpaceX used would be clean again or that based on government order SpaceX could de-orbit 99.9% of all sats in a week.
So how about we allow boats onto the river and figure out if its really the end of civilization to do so.
Some doors are very difficult to un-open, and caution is warranted when making sweeping changes to space that may do any number of negative things, including make future spaceflights more difficult, make ground-based space research impossible (increasing the price of future space research and making satellites the only way to do get good data), etc.