For roughly 100% of the software you install you have no idea what goes on into the installation. The only reason you're making that criticism about TimescaleDB is that they making it really easy to have a look how it works behind the scenes, and you like posing as a purist.
... unless you tell me that you don't use computers because of much code goes into the installation of the OS, or browser, in which case I applaud your self-consistency but you'd be lying because you're using a computer. Not to mention postgres itself. So you refuse to use Timescale because of the installation, but not PG? Get outta here you poser.