"Their only possible reaction would be to bombard troops there, destroying their own export infrastructure in the process."
Right, so if that's their only possible reaction, isn't that a bad thing for everyone? It looks like they've made it clear they're not going down without bringing everyone else with them, and why would they? What options do they have?
I mean they seem to have made it clear by their actions. They're in an existential situation, so its not like there is any reason to hold anything back.
If your opponent is trying to turn you into Libya, then whatever you do just has to not fail as badly as that for it to be the right move. You basically become a cornered animal.
The thing about disintegrating regimes is there is no "they".
There's people with power, looking out for their own self interests. You think after a few more weeks all of the newly promoted Iranian military leadership is going to weigh a few million dollars in personal benefit against the glory of the cause and decide on the latter?