I know, but it's still many many more steps than people seem to want to take, especially when nobody wants to install the itch.io app or they get scared by the first-time "this application is from an unknown developer" warning. Believe me, what seems really easy and straightforward to us is an impenetrable, scary barrier to even incredibly experienced users.
I mean the main people who would be using the .love bundle would be Linux users, and hopefully they'd already know this stuff, but this is just like an impenetrable force field around a lot of things even for them.
The long-term of having the itch.io app supporting LÖVE directly is great. These short-term "just ask the users to" ideas preload a lot of assumptions into the word "just."