It's not only just that. This type of thread promotes centralisation of culture. Think about all of the frogs that are posted on every board on 4chan. These types of threads are a tumor because they promote that kind of humor. Imageboards should have differing cultures but most if not all imageboards feel like exact carbon copies due to the centralisation of so called "memes" which was honestly the first thing which signaled the decline of imageboard culture. GIF's, Video's, pictures, stories, jokes and just any average picture is simply labeled a meme when each could have been a different in joke it quickly gets spread to normal central area's of the internet such as reddit.
Not to mention pepe the frog is a psyop. It's created by freemasons. Remember the "kekistan" cult worshipping pepe as a fucking god. Well in egyptian mythos this thing called kek is a god of chaos and not only that the original image of pepe while smug has a freemason hand sign on it. Pure utter trash you can tell if these memes are like this because they become unnaturally popular and the moment pepe got on the fucking mainstream media we really should have been aware what was going on.
Here's the original pepe picture.