Pipelines are incredibly vulnerable to being taken offline by an inexpensive long-range strike. You can't just put them in the middle of a war zone, especially when we (the US) have targeted that same type of infrastructure first.
Pipelines are usually buried under the ground. Pumping statins could be protected by short range SAM systems. An undegraund pipeline can be destroyed by a heavy glide bomd (not an option for Iran) but should be relatively safe from shahed drones. Iran's ballistic rockets are not precise enough to hit a pipeline wihtout spending multiple rockets (in which case it would be cheaper to repair the pipeline than to produce all these rockets).
sure, as the oil wells and the pumping stations and everything not underground, but right now there's not even an option to try. (also loss of a pipe section compared to the loss of a tanker is much better economically, easy to replace, not to mention that there's no loss of life, so ultimately it can bear more risk even if there's an active conflict.)
None of those have near the capacity to replace what was flowing through the Straight and will not replace the Straight for a long time. That's the whole problem.
If there were viable alternatives to the Straight, the US would have attacked Iran decades ago. Every US administration has had people in the wings desperate to "Fix" the Iran situation, but only Trump was stupid enough to try it.
Meanwhile, the actual production is meaningfully damaged, and for at least a couple years.