I spend a lot of time experimenting with atypical tunings that wouldn't be captured in a dropdown, and I could see this being really a useful tool for learning my way around tunings where there isn't much existing repertoire to pull from. It's a super niche usecase though, you'd probably cover 99% of players needs with just Standard, drop d, DADGAD, open C and maybe open D.
I'm in the same boat as hnaccount141, I play around with a lot of non standard, and agree that a drop down would probably cover a lot of peoples use cases.
