Most people with normal morality think expanding health care access to the poor is a good thing to do, which is probably why they don't feel compelled to defend the "extortion".
If you have someone running around threatening people with a bow and arrow if they don't give up their money on the claim that Robin Hood will give it to the poor, the people who refuse are not inherently doing it because they hate poor people.
Especially when it turns out that a lot of people the money is coming from aren't actually rich, and a lot of the "people" the money is going to aren't poor people at all but major corporations.
