Sadly hashbangs are technically limited to: 1) Support only absolute paths, making it necessary to use /usr/bin/env which is in standardized location to look up the uv binary 2) Support only a single argument (everything after the space is passed as a single arg, it's not parsed into multiple args like a shell would), making it necessary to use -S to "S"plit the arguments. It's a feature of env itself, for this very use case.

So there isn't really much to do to make it simpler.