People consider vegans on Lemmy as too preachy. Even in vegan communities here, mods have to remove soooo many inappropriate comments (I read a few of these and they keep getting removed for good reasons). Comments that suggest going vegan on posts about animal abuse are downvoted.
At the same time, whenever there is something about Windows or Chromium based browsers, people here are doing exactly the same. “Just use Linux/Firefox/whatever”.
Your examples would have more similarity with suggesting a vegetarian diet as an alternative to a mix or most meat diet. That would be a functional alternative, like suggesting a different OS or Browser.
Veganism more like a political statement that if you eat meat your are a bad person for harming animals. All vegans may be vegetarians but not all vegetarians are vegan.
I will admit there are many OS and Browser purists that might be more like vegans telling you, you are bad for choosing the one you currently use. There are FOSS purists that only tell you to use FOSS because it is NOT commercial not because the software is better for what you need.