The point is that many install scripts do insecure things such as downloading over unencrypted channels, demand sudo without a good reason and are generally not

The point is that many install scripts do insecure things such as downloading over unencrypted channels, demand sudo without a good reason and are generally not careful to have a minimal impact to the machine. At the minimum I want to know what it does and where it puts stuff. This assumes that the software package itself is trusted, which is (still?) a reasonable assumption to make for open-source and big name companies. By the way, it's poor form to downvote someone just for disagreeing with them.