That's a very human sentiment, and I share it. That's why I don't swap my car wheels myself, I don't want to feel responsible if one comes loose on the highway and I cause an accident.
But at the same time it's also appalling how low the bar has gotten. We're still the ones deciding that one cloud is enough. The down being "their" fault really shouldn't excuse that fact. Most services aren't important enough to need redundancy. But if yours is, and it goes down because you decided that one provider is enough, then your provider isn't solely at fault here and as a profession I wish we'd take more accountability.