Quality costs money and most people aren't willing to pay a 50% premium for it. Some are. Processes that rely on human beings are fraught with uncertainty and mistakes will be made and get out the door. Even stuff that is made in US is just as susceptible. I've been in manufacturing my whole life and the folks that are doing low paid assembly work are not the rocket scientists you'd like them to be. There are exceptions, but most manufactures have trouble getting people to show up each day, and preferably sober. How many of those pumps would can be assembled before a person's mind goes numb and they don't care anymore? I don't trust anything I buy anymore whether is it Harbor Freight or made in USA.