Polygamy has far more basis in human tradition than fudgepacker marriage. You can’t open the Pandora’s box of the later without allowing the former.
Polygamists at least have the excuse that they haven’t read all of their Bible and have misinterpreted the early verses. What excuses do the Sodomites have, other than being in league with Satan and hating the Bible?
It’s pretty obvious to anyone using even what good sense God gave a mule, but there are those out there who’d argue against the connection, if they care at all.