LIGO can isolate itself from seismic backgrounds, but it has no artificial gravitational-wave foregrounds. (Yes, Newtonian Noise is a concern for future generations, but it is expected to be modeled and subtracted well-enough.)
Arrays like Starlink are a persistent foreground for the big radio telescopes. SKA and the like are in the Outback for a reason, but for this there is no escape.
I'd expect that starlink could be disabled within a few hundred miles around green banks etc. Would that help?
Typically for high resolution images you actually take multiple images. So it would be more work, but you can definitely remove foreground objects. This is like how you can take a bunch of photos of a landscape with people moving around in it and remove all the people by just looking at what isn't changing in the images.
I'm not saying it is easy, but it is definitely possible.
If only there were launch platforms that could put up smaller telescopes (optical and radio).
I mean you can do a lot with telescopes that are much smaller than Hubble Class or JSW. A lot of people are doing work with telescopes that are much smaller. Also, as long as frequencies and locations are published, much of this noise (not all!) can be removed. Sure, the VLA is going to have a major headache, but LIGO wouldn't exist if we didn't know how to remove noise (LIGO had to deal with noise from cars many miles away and all kinds of vibrations because it is ridiculously sensitive).