As low tech as they are, they fly low, can’t really be detected by radar and you only need one to get through. Pipelines are long and can’t be protected.
Yeah buried pipelines are common but I can’t imagine Iran is going to let them be built without interference. Also, a 2000 mile buried pipeline can take 2-3 years to build and that’s without account for 2-5 years of planning, permitting and land acquisition phase. None of this is going to happen soon.
