I was once a young landlord.
Had a tenant that complained about a tub faucet not working properly.
I told him it was working good enough, and I refused to have it worked on.
He called the city, to see if there were any code violations.
Yep, evidently there were.
And they got fixed after I spent about $2000, and dealt with the hassle of being on the city's radar.
I am now an older, wiser landlord.
Small things that serve the tenant's peace of mind, that make them feel good, and that do not cost that much, should be done.
Plus, the tenant will cut you more slack when there is a big inconvenience in the future (HVAC goes out in winter or summer and replacement takes a week)