You can write it in text, but it works much better as a picture.
You don’t have the context of it being at a “meeting”, and saying that to guitars. And adding that to a text joke makes it a bit too long and convoluted. In picture you just need one balloon, and it’s perfect.
I don’t think it’s worth to ban those type of posts just for fear of turning into a generic shitpost community, so far the only non-dad jokes (as a category) I’ve seen upvoted in here are the couple “jokes about dads” that have been posted recently, and if they start getting spammed too much we can restrict those specifically.