Ok... I mean... never witnessed delays with bluetooth headphones... With mouse yes... I agree with you and I use wired ones for that reason. But sound never got a problem, or at least never noticed that way. Even on shootthemup kind of stuff.
Mouses get destroyed by me... the buttons max clicks are just something that lasts 3 to 4 years max for me. keyboards thought, last forever almost.
I have the complete opposite experience, keyboards (even though I buy high end ones) tend to act up over time, where mice I just tend to want something better.