I now do want to catch all email as it has become my lives work to report spam.
So I figured out an easier way to catch all email using simply the serveradmin command-line tool (this only takes email that would otherwise bounce):
sudo serveradmin settings mail:imap:lmtp_luser_relay_enabled = yes
sudo serveradmin settings mail:imap:lmtp_luser_relay = catchallusername
sudo postfix reload