If he was getting in the way or come uninvited would be one thing, but other than that nothing wrong with an extra option.
Rich and well known people can’t win really. They get criticised for helping and also criticised for not bailing out bad government policy.
Counter-argument: they are already winning, and will continue to win until the day they die. I think the obscenely rich can cope with a small ding to the ego every now and then.
~ Gavin Belson
Personally I don't think Elon was doing this as a PR stunt. I believe he saw it was a very difficult problem with life and death time constraints and he has a bunch of the world's best engineers that build things for extreme environments.
They can, they just need to no interact outside their bubble, make sure they pay their taxes in a fair way (because, you know, the Panama is 100% legal), and do not show up when their not asked to.
Musk is great at building cool toys, but I'm not sure he's great at making humanity better. (hint: we don't need more battery, we don't need to go to Mars, we don't need more cars on the roads, and some people sure don't need a submarine). Now if Elon wants to go in the cave and bring oxygen bottle to those who need it, or explain the kids to never give up, well, that'd be nice.