I can see why they'd think that. There might even been some truth to it. After spending years working on becoming fairly good at one sport, giving it up to invest time and money in one where I don't shine isn't exactly appealing. But if boarding were as amazing as its fans claimed, I would have gladly made the switch. Skiing just does more for me.
Boarders enjoy the increased sense of freedom they experience when they ride.
The thing is, I don't want to ride, I want to drive. Skiing offers more control, which allows one to be more aggressive. And for me there's no bigger rush than slicing through the moguls in a series of aggressive, tightly executed turns. But that's me. Many prefer the quicker learning curve of snowboarding and the speed and feel of riding one board.