Indeed, instead, we should warn everyone to get out, and then blow up the premier government building....like the Presidential palace, or wherever the Ayatollas live.
That should about cover it.
“Proportionate” may have figured into the equation another way...
Iran destroyed an asset we use for military purposes. His planners may have thought that Iran should lose one of their assets. They weren’t thinking of loss of life, just the cost (both) of the action to Iran.
150 persons is about the crew size of a fast attack submarine.