This much vaunted regime change cannot happen without a serious number of boots on the ground since all the weapons are in the hands of the regime.
A ground offensive will be fraught with difficulties, dangers and high body counts.
Even if such change could be achieved, what will be the cost of rebuilding the country and who will pay for that?
What has the war cost the US already, both in terms of hard cash and ruined alliances?
Suppose a naval escort starts to work in the SoH, the Iranians only have to get lucky once and the waterway is both blocked and polluted with oil.
There is a way out but it involves actual diplomacy (difficult with the low level of trust in the US this year) but it could be done - perhaps Trump could employ Obama as a trustworthy ambassador and negotiator?
The military solution just isn't going to work, just like it didn't in Vietnam, Iraq and Afghanistan but, just as when those were live events, the politicians and their advisors are more worried about votes at home and losing face so continued threats and bombing will continue until finally realisation dawns in the cold light of day.