I’m new here but if a poster really wants to know how many people agree with them what about creating a poll? Polls convey more information than the Hobson’s choice of giving a post your “like”; at least they do when well designed.
If a poster doesn’t convey the want for such feedback at the time of posting, what value do mere tokens of appreciation add to the discussion?
I can understand being annoyed by notifications for replies that add no substance to the topic, such as “I laughed” or “me too” or “+1” or “like”. If the community thinks such posts are inappropriate for a forum they should say so; see for example rule 6 from General Questions Rules & FAQs: