It's trendy right now. And it's profitable for manufacturers. In a year you could build one solid brick house with a proper foundation, or crank out a bunch of these modern houses and make way more money.
Before, if I saw a clog, like water wasn't draining in the tub or the sinks, I'd just pour some crazy chemical stuff down there and hope it'd help. And it did solve the problem temporarily for the most part. Maybe I should've figured out why the clog even happened in the first place though.