This kind of argument could run and run. It comes down to what expectation of safety a passenger in a spamcan should reasonably have. Clearly not the same as in a 747 with 2 pilots, but what should it be? There are 2000hr pilots who are cowboys, and 200hr pilots who are very careful. There are planes which are flying wrecks (true for many training planes) but mechanical failures don't feature that much in GA accidents.