Advice : Tap in Sidebar, click Block community. This is literally a whole community devoted to the kind of things you want to not call memes:

Microblog Memes !microblogmemes@lemmy.world

A place to share screenshots of Microblog posts, whether from Mastodon, tumblr, Twitter X, KBin, Threads or elsewhere.

Created as an evolution of White People Twitter and other tweet-capture subreddits.

Rules:

Please put at least one word relevant to the post in the post title.
Be nice.
No advertising, brand promotion or guerilla marketing.

Posters are encouraged to link to the toot or tweet etc in the description of posts

You’re missing the point. Meme isn’t something you gatekeep. It’s simply a term for any arbitrary amount of idea. Everything is a meme.

Your argument is like saying “nothing has mass if you call everything mass”.