Some people feel they need meds to get by with this disorder.
Some people feel confident that they can manage without meds.
For some people, the meds really help them keep their symptoms under control.
Some people are med resistant.
Everyone's different.

For me, the typical 6-8 hours of sleep per night is essential. And that's not going to bed late and sleeping in late. It's going to bed at around 11 and waking up around 7 ideally.

Thinking that you can get it under control on your own without meds may or may not be, as you say, "delusional." It may or may not come back stonger. It may or may not get worse.

Many of your questions would be better answered by a professional. We aren't doctors and can't diagnose you. Pretty much everyone could see in themselves a symptom or two from any disorder. You should probably just set up an appointment for an evaluation, describe your symptoms to the doctor and see what s/he has to say.