Sat launches

Considering the number of research satellites that fail or partially fail
due to instrument or other presumably fixable problem, why aren't satellites
(whose mission profiles permit) launched to a near enough vicinity of the
ISS so that astronouts can go out and fix 'em

Surely the sats could also be made fixable?

How many 100 Million to Billion dollars sats could have been salvaged this
way.

Could this be a way to make space colonisation pay?

Hey, maybe the sats could be constructed in orbit?

It could be a good excuse for geosynchronous and Lagrangian stations too