Because the biggest NHL market just so happens to be in a state with high income taxes, and they also have a major player friendly salary structure. While a smaller market in a state with no state income tax has the most team-friendly salary structure in the NHL. So people have shifted to taxes to deflect blame from their rookie GM for creating that player friendly salary structure.
Make no mistake, if the Los Angeles Lakers’ Rookie GM got taken behind the shed by all of their RFAs and the San Antonio Spurs had a major team-friendly salary structure, you’d hear the same kind of complaints from fans of the LA Lakers. And that vocal minority, despite being generally disproven with facts, would continue to state their case.