In most cases I agree with this, but maybe not for potentially dangerous things like cars? What if someone roots into their car and disables some essential safety feature - maybe even a legally mandated safety feature?

More concretely, the expertise-required-to-access-root is in a different field to the expertise-required-to-make-wise-changes. i.e. you might know how to hack a car, but that doesn't mean you know how cars operate.