EDIT: Whoops I misread, I thought you were saying that "run-only" was just a flag of sorts.

osacompile[0] does actually produce some form of bytecode when you pass the "x" execute only flag.

Here's a script that opens Safari[1] and the compiled output[2].

[0] https://ss64.com/osx/osacompile.html

[1] https://pastebin.com/raw/u94cwDj7

[2] https://pastebin.com/raw/9uuF39jW