I tend to agree with mallc's viewpoint...
I believe a thorough study of the process is what is required, regardless of the type of press involved. Safe reloading should follow from that understanding.
I don't see how anyone can reload safely if they don't understand what they are doing.
From some of the questions I've read recently, there are some newer reloaders out there that haven't a clue about their single stage equipment.
Long ago, it seems that all shooters had to start out with a single shot bolt-action .22 -- nothing else would do. From that foundation, centerfire rifles were added, perhaps semi-automatic actions, etc.
Today that just isn't seen. The new shooter has a Glock, or an M4 copy, and that's what he's trying to learn with.
Like reloading, I'm sure there are shooters who are somewhat challenged by the complexity of their rifles/pistols. With time and study, they will probably figure it out. If they ask questions, they will probably figure it out faster. (At our range, I try to find time for any new shooter who will ask a question, and also avoid saying anything to those who don't.)
So, for my $0.02 worth, I'm not so much worried about what kind of press the guy is using as I'm worried that he isn't studying the process of reloading.