Agreed .... if not primary then Chahbahar would be an ideal secondary objective for the US.
- Lowest Air Defenses
- Distant from Tehran
- Lowest overall population
- Readymade Baloch Insurgency, providing complete local support
- Cover of Makran Mountains
- Only 3 roads as an inlet from mainland Iran
Any other place would be suicidal to send armies into. Chabahar would be an easy target .. pretty much a replica of reasons why Ukraine went for Kursk at the suggestion of US (distant from government centers, easiest way in, sparse population, no defenses, no roads ... and can be traded for other objectives). In this case, US can use it as a trade-in for the opening of Hormuz.
Of course Iran can keep focus on Hormuz and return for Chabahar later, just as Russia did in case of Kursk. But in the absence of air superiority, US can create far bigger long term problems from Iran, via Chahbahar.