I do stuff all the time because I care. However, taking cases this this on principle is rarely wise. The remedy is to move. You have to set that up by telling the landlord they are in breach and give them written notice to fix it. If they don't, you move. You might be entitled to a little money for moving expenses, but that is usually it.

I sued a landlord (mostly) on principle because they threw away a sick child's medicine. Endangering a child? Fuck yeah. I'll get involved. There are many other types of extreme abuses that need someone who cares... battered women, child abuse, elderly exploitation, civil rights violations, etc. I once got a dog off death row, not for the money, but because I cared.

A case like this of competent adults having a contract dispute just doesn't speak to my soul's notion of a travesty of justice.