No, vote away (but use your strong-vote sparingly if you lack faith in yourself)
If there were 100+ votes on everything, then below-average voters would be making things worse. But in the real world many things have 0-3 votes and the question is sometimes more like “do you provide more signal than randomness/nothing” than “do you provide more signal than average.” (But often not.)
I expect voting causes users like you to engage more and become better at engaging, and I think that’s much more important than the direct effect of your votes (which is sign-unclear and near-zero-EV).
Unofficial takes:
No, vote away (but use your strong-vote sparingly if you lack faith in yourself)
If there were 100+ votes on everything, then below-average voters would be making things worse. But in the real world many things have 0-3 votes and the question is sometimes more like “do you provide more signal than randomness/nothing” than “do you provide more signal than average.” (But often not.)
I expect voting causes users like you to engage more and become better at engaging, and I think that’s much more important than the direct effect of your votes (which is sign-unclear and near-zero-EV).