> it's is against rabbinical law.

I don't know where you heard it, but this is wrong. The Temple Mount is a large complex and the school of thought that the Holy of Holies could've been anywhere on it is fringe. There are countless places to worship that are considered safe.

More people think the Dome of the Rock is where the Holy of Holies stood (and that's controversial) than people who think it could've been anywhere. Israeli governments in the past have amplified these voices in order to convince mostly secular Jews who didn't know better to not go to the Temple Mount as tourists. Those who actually might be interested in praying understand the situation.