You gotta do what you gotta do!
Totally true. Plus, someone might have tried to press them in at one time.
When I got out of the Air Force in 93, I worked at a car parts/tires/service store called Western Auto for 5 years while I went back to school. I was at work one night and a guy came in complaining that we sold him some bad ball joints that ruined his control arms, and he wanted a refund AND for us to pay for having a mechanic fix his car. I overheard it all. The new/young assistant manager was just about to agree to this when I stepped in. He had a Dart; I don't remember the year. I told him I was the manager on duty and asked him what the problem was. He proceeded to tell me that he paid to have the new ball joints pressed into his UCAs, they were both loose and the UCAs were destroyed. You should have seen the look on his face when I told him they screwed in with very find threads. He didn't believe me, so I got one off the shelf and showed him. To his credit, he took it like a man and left peacefully. I suggested he have them tack welded in, and he thanked me.