They're "bizarre" if you haven't seen the other thirty million comics exactly like them on this site. Unfortunately, pointless randomness isn't funny... even if people make thirty million comics assuming it is.
There isn't a single example of "pointless randomness" in any of these bar HockeyBaby. If anything it's calculated randomness. When it comes down to it though, I'd rather see a bunch of comics that make no sense than the awful, sitcom humor bullshit that occupies the majority of the top rated list. Or the ridiculous idea of using recurring characters. I cite Queer Eye Meets the World Poker Tour as the most contrived comic ever made. If you can look at that pun heavy trash without barfing up your intestines, something's wrong.