We can discuss this forever, I think we're hitting a religious point of view here.
Notes are text (usually as you say) but text can be then embellished or formatted for easier reading/understanding/whatever, otherwise it just looks like a big pile of words. I don't want a text processor and nor Joplin isn't a typesetting program.
Notes are whatever I want to make with them, that's how I hand write notes (fair example I guess).
I'll give a try to the markdown way to write notes.. any link/tutorial that would suggest? Thank you!