Was this guy uniquely evil, as far as health care executives go? Like...if more of them get murdered, will you just shrug and say "yeah they kinda had it coming"?
But speaking more generally - I think a lot of people would, indeed, shrug. The US healthcare system is one of the most miserable parts of living in this country and virtually everyone has had to deal with it at some point. And whether or not they deserve the direct blame, insurance execs (and pharma execs, etc) directly profit from that misery.
I think a lot of people are not going to shed a single tear over events like this.
I think if you poll the people taking this as a good thing, you will get an overwhelming answer of “probably not”, and the implications are exactly what you suppose.