> For example, having the opinion that manifest V3 is good for users is an opinion that will not thrive on HN.

There is a difference between expressing unpopular opinions (e.g. "manifest V3 is good"), which receive an appropriate level of considered disagreement; and expressing opinions that are removed administratively.

In my experience, the former is quite common, while the latter only occurs in cases of hateful or off-topic comments. That is as it should be. No one is obligated to agree with you, and that fact should not dissuade you from expressing yourself.