What an utterly bizarre statement. As someone who has never owned a car or had a full driving licence, but who has had a bike for getting around, I much prefer having adjustable suspension than not. In fact I will vouch that mountain bikes in general are far superior to shitty overpriced road bikes, which ride uncomfortably and have those stupid narrow wheels that transfer the force of every pothole and raised manhole cover while getting stuck in tram tracks (and of course, they are the favoured transportation of knobheads in Lycra who think they're in the Tour De France). The best ones in my experience are the ones with a hinged frame and a spring that can be adjusted by hand. A short stop and a few twists, and your bike can adapt its ride handling for smooth roads or rougher stretches.
Suspension on bikes is a great idea. Anyone who disagrees must have never had to deal with poorly-maintained roads and/or rougher unpaved paths as a cyclist. Or is a masochist who likes having their goolies pummelled while riding.