Re: "there are much more suitable options for that"
"It is actually more important for a consumer OS to be solid and work well."
Not more important. Equally important, perhaps.
"That is because consumers know little about the running of a computer system, so the system must do everything to protect the consumer (against themselves and others)."
Which is a huge part of why I'm not thrilled by the idea of Linux being a mainstream consumer OS. You have to give up far too much in terms of flexibility, control, and usability to meet the goal of being idiot-proof.