Use a Torch to Remove Control Arm Ball Joints

[NortonDommi]

We actually did talk about that and it is a very good point. The new ones are definitely slightly smaller than the originals otherwise the arm would have needed to be expanded to get them in. The company making the new ball joints could have made them that way so these arms could be repaired. The new ones are press fit and are tight, they are just not as tight as the factory ones. So do they need to be as tight as the originals? It's hard to say. It is common to replace these like we did with ball joints that do press back in and in pretty much every other vehicle the originals can be pressed out fairly easily. They cannot physically come out of the arm because the large retaining clip on the bottom and the ball and socket itself is the weak point versus the socket and arm connection.

More than likely the entire arm is supposed to be replaced not refurbished. I'm old enough to remember when the ball joints on some vehicles were welded in.
A modern vehicle is a wonder of engineering in materials and build but are made to break. They, like all things made today have a designed finite work life.