Why do schools expect everyone to be good at writing essays?

Because good communications skills are at the heart of every profession held by a college graduate. It's really not that difficult- but the key to writing well is reading. For a generation who watches YouTube videos instead of reading, that's a challenge. But read more and your writing skills will increase.

They expect proficiency an expedition of research and proper grammar with personal writing flair.It should be fun to find out what you can create. you should be able to do this without fear or embarrassment .Those are traps you set for yourself to fail.You control those defects of character ,put them aside ,They do not help and they are of your own creation.