That’s not true at all actually, running a PDS uses about as many resources as a regular personal blog HTML server (as it doesn’t do anything but serve up your signed posts), and running a relay with only the couple thousand people that have decided to host their own PDSes is home self-hostable.
Good blog post here clearing some stuff up: https://whtwnd.com/alexia.bsky.cyrneko.eu/3l727v7zlis2i
This guy guix it