I wasn't commenting on the kid being picky (though being overly picky isn't great for a kid because they limit their experiences), I was commenting on how he wouldn't eat anything except hot dogs and McDonalds' fries. Unless your objective is to spoil your child while simultaneously making sure he's dead by the age of 40, this is about as irresponsible as it gets when it comes to parenting.
It's not bad for a kid to have a few options, but those options shouldn't include hot dogs or fries any more than about once per month IMO.