Install binaries to /usr/bin?

[raxod502]

I noticed when executing

$ pipman -S python-hdl-checker
$ pacman -Ql python-hdl-checker | grep /bin/
python-hdl-checker /usr/lib/python3.8/site-packages/bin/
python-hdl-checker /usr/lib/python3.8/site-packages/bin/hdl_checker

that binaries seem to be installed to /usr/lib/python3.8/site-packages/bin, which is not on my $PATH by default. Why not install to /usr/bin instead?