He was no computer scientist, but he presumably knew a lot about specific non-computer things. The more important those things are, the less important computers are likely to be (relative to computers, that is). So I don't think Picasso had to have known much about computers to denigrate them rationally.

But I am assuming that Picasso knew some pretty important non-computer things. And it does help to remember when he stopped being able to learn more about computers.