It's absolutely unreasonable to expect that, and the wrapper should stay. I don't have Maven installed anywhere, and i don't have Gradle on the global path, because i work on projects which require different versions of Gradle.

Saying that removing this would make the project more minimal seems deeply confused to me. Minimalism is not measured in the number of directory entries at the top level, but by the amount of stuff the user has to understand. Taking the wrappers out does not reduce that.