Because of the hope that at some point someone smart will discover an exploit that will allow everyone to install their own homebrew and possibly a completely different OS which will result in a good spec PC with powerful GPU for extremely cheap.
I just remembered china was selling PCs with the PS5 hardware I think ltt(fuck them but irrelevant) did a video on it long ago and I think if you were just to dump the bios from that to a normal PS5 idk what the difference would be