How sympathetic do I need to be about Ratly concerns?

I’ve got all the rats needed for the final (non-Fate) upgrade to my lab, but just noticed that it says that if I use my albino rat I won’t be able to use its opportunity card. So far it only seems to raise my sympathy for Ratly concerns. Is this a stat I should be raising to a certain point before getting this lab upgrade? Are there other ways to get that higher if I use my albino rat? Is it not worth the wait and I should just get the lab upgrade now?

EDIT: Thanks for the advice! I’m putting that rat in the lab!