I confirm that here in France, homeopathy is very common, and even MDs frequently use it.
But let's be serious. The placebo effect is one of the most effective thing in medical problems. The problem with it is that if you don't believe in it, it no longer works. Building false theories that makes sense for most people is therefore a skill that can be much more effective than finding real cures.
So, in a way, I can't blame people who use it just because, as an ultra-rational guy, I do not have the "chance" of being able to use those things with a positive effect. Maybe using astrology and homeopathy would indeed increase the efficiency of the health system. Not because it prevents illnesses, but just because we have to recognize that it really works by misleading people's brain.