First of all, how old are you?
Secondly, most of what you learn in school it's indeed useless, BUT all that knowledge helps the brain to create new connections - it's studied and confirmed by smarter people than us.
Thirdly, most successful people have some studies in their field - who says something else is lying.
And last but not least, Digital Marketing is used by a lot to justify that they don't need anything else and therefore, fuck school. All those stories claiming huge earnings from marketing, most of them are fake or you have to REALLY good to get there. You also need TIME. Lots of it.
SO.
If you feel that school is a waste of time, probably is. If you think that school can teach you something useful, it probably would.
The rest is poetry.