I think you are underestimating the added complexity and cost. Radio telescopes aren’t like optical ones, they are huge arrays of dishes covering a vast area, and a key aspect to them is that they are relatively cheap. Space telescopes cost billions, last less time, cost far more to run, and often can’t (reasonably) be repaired.

The unfortunate truth is that we will end up picking between furthering our knowledge and furthering private wealth, because even if we put some in space, it would be prohibitively expensive to match what we have on earth.