I live in Argentina, in a small town with some nice climbing from 6a to 7c but we dont have many hard routes, so we chipped and glued some holds on a very steep overhang with super pour rock quality like you are describing and now we have some 8b/c projects to climb on. I dont think that kind of chipping is wrong (huge overhang with no routes, poor rock, no holds) especially with the COVID situation, people usually can't move from their local crags.
In my homecrag, Sant Llorenรง del Munt, there are some overhangs of poor rock, almost sandy rock, some people are bolting New lines with chipped holds and glued stones...
What do you think?
Some locals are chopping the routes and there are some problems