Well both of those examples could potentially electrocute you or start a fire and both can be done by a homeowner if he feels like it.

I don't disagree that it's a bit different in certain ways but I feel like that's drifting off topic. It shouldn't be up to manufactures to determine these things unilaterally but rather the legislature. Particularly any justification to the contrary rings hollow in this case because there's a very strong conflict of interest.