[jemorya]

I'm not sure that the information from such experiments is only really relevant to applications in microgravity environments. (Hopefully I'm not misunderstanding your point too much.)

The data points from microgravity experiments don't exist in isolation; presumably there are data points for similar experiments at surface gravity. Removing gravity from a system could say very much about how gravity affects the system, and thus how the system works on Earth.

We also might discover effects so important that it would be worth going to microgravity to get them. Stepping out into the unknown just to learn how it works is important.

(Disclaimer: I know jack about what kind of microgravity experiments are going on.)