You aren't a vegetable eater. But you don't care if others are vegetable eaters. - (This is how most people feel.)
You don't personally get an "ick" when people talk about their healthy tendencies in front of you. - (But other people do.)
Some other people like you are ALSO okay with open eating of vegetables. - (But once again, other people are ALSO Not Okay with it.)
"Shoving it down people's throats" is how it feels to people who are NOT OKAY with open healthiness and general consumption of vegetables. - (And feeling that way is okay & natural, just like open healthiness to you feels okay & natural.)
So you yourself can see that the idea of eating leafy greens makes some people's skin crawl. - (So therefore, they choose to have the approach of "If I don't know about it, I'm okay with it happening behind closed doors.")
Moral of the story here is:
People LIKE what people LIKE. Some people like red meat and junk food "behind closed doors." Other People like Junk food. Very few people like celery, onions, and carrots. And there's a group of people who like eating healthy/leafy greens "behind closed doors."
We all have to share Public Spaces. And therefore, if we are to have happy peaceful public spaces then we can't all just do what we individually want in public spaces. We have to control ourselves when in the public eye. Otherwise people will get upset and will speak out. And there's nothing you can do to change that.
And right now, there are people like me saying, "Hey, I don't like this shit. I want to use this public space as intended, but my peace is being disrupted by people behaving INAPPROPRIATELY in this specific public space. Can we please just use this public space as it was intended for. And if not then I'm gunna start behaving Inappropriately too. And then No One is gunna have fun in this public space."
That's all it is. Keep Skiing about Skiing. Or else people will get mad.