I assume you mean, that you disagree with my idea. In this case I find it a somewhat valid use of a downvote within the system that I outlined. But if everyone downvotes what they disagree with, before actually engaging with the content, it turns Lemmy into just another echo chamber.
I disagree. There is rarely a relevance for like/dislike and all upvotes and downvotes are, should be viewed as and used as indicators of relevance.
Upvote what you find relevant/interesting, not what you like.
Downvote what you find irrelevant to the community or what uses language that you find inappropriate for that community, not what you don’t like.
:D