There is a fair amount of naivete in the stances suggesting 'it's nobody's business' and 'the media blew this out of proportion.'
Athletes, like other performers are paid because they're in the public eye. They're not paid as well as they are because they're good at their jobs; if they were good at their jobs and no one cared about what their jobs were, they'd be making subsistence wages like the rest of us. And yeah, it made Mike Fisher infinitely more interesting to the general public that he was dating (is dating? I don't follow it close enough) Carrie Underwood. Same with PK Subban and Lindsay Vonn. You might say that personal lives are personal, but savvy marketing professionals parlay glamourous relationships into money for these athletes.
If you don't think the reaction would have been different had Subban shown up in public a lot with a skier named Lester Vonn, then I don't know what to tell you.
And yeah, reporters are going to write about stuff that is in the public's eye. They write about things that people are going to have an emotional reaction to. It's been that way since the invention of the printing press. Does the issue of Pride jerseys or rainbow stick tape impact a lot of people? No. Is it a thing people are going to talk about? You better believe it and the numbers don't need to be big for it to get noticed. If only 10 per cent of the population cares about Pride jerseys, that's still 30 million pairs of eyeballs in the US. That's a lot. Is it possible it got attention that was outsized for its important? Maybe, but the topic has been a central point of controversy for decades, and the fact that there are still so many people weeping and wailing and gnashing their teeth over teh GaYs means it's still a topic worth having in the public eye. I don't believe the opinion of an athlete on this topic is more important than the opinion of any other Schmo on the street, but again, they live in the public eye and rightly or wrongly, they're going to get sought out for their thoughts.