Takes many years to get a pipeline permitted, then you need to build it adding years and then you must be sure that you have a lot of demand where your pipeline goes. Delivering to far spread out clients like mines gets hard. Trucks (and rail cars) are much faster as when you rent them today, they roll tomorrow delivering clean energy to where you need it and not where the pipeline dictates.
Not all liquefied natural gas exports leave the United States on giant ships from the Gulf of Mexico or Atlantic Coast. Some of them get delivered by 18-wheelers to meet growing demand for energy in Mexico.