That's a gross over-generalization. You must be sailing really crappy production boats that were not fit for purpose. When we were out cruising, most of the boats doing what we were doing were production boats of one type or another. Sure, there were some I wouldn't take out of sight of land, but that was because they were crap boats, whether they were production boats or not.Production boats all suck. All of them. They are built by factory workers in a factory. No boatbuilders involved. They are cheap. And that means corners are cut. They are not suitable for sailing across oceans. I have spent much of my life sailing production boats across oceans. It's not what they are designed and built for.
Maybe Bob Perry could chime in on this. He has designed any number of production boats that have done a lot of serious cruising.
Are you lumping boats like Hallberg-Rassy, Swan, Hinckley, Oyster, and a lot of others into the "production boats suck" category?