If your opinion is that kittens are cute, I'm on board. If your opinion is that everyone over 30 should be sterilized unless they are in a top 10 percent earning category, you're going to have to work for respect for that, and better have a damn convincing argument.
If you're a vetted expert in the field in question. Yes, I'll give your opinion weight. I e. The millions of scientists and doctors talking about vaccines.
If you're a chad who watched a YouTube video, no I'll dismiss you as the idiot you are.