Wow how about some answers that aren't imbued with contempt?
The reason is that IM is HARD and even as an attending...
well, a lot of hospitalists say they feel like overglorified residents....
you can go outpatient instead, but 1) IM residency is hit or miss for making you feel super prepared for that, but if that's your goal and depending on the program you can make it happen but that leads to 2) output IM is much like FM except typically more complex sicker patients....
The point is, what you see is pretty much what you get. It's a life of rounding, admits, discharges, and lots and lots and lots of notes. Lots of bread and butter, bounce backs, etc.
It's not like some specialties like say ENT where life shifts dramatically out of residency.
You didn't come in the thread sounding like someone that enjoys IM, rounding, or writing notes. That doesn't bode super well, and no one here can make it sound like it does.
Interns have the greatest note burden in some ways as far as length, but upper levels write plenty of notes, typically the transfer and d/c summaries. If you're an attending with no residents you write plenty of notes, you just learn to write ugly short blurbs. If you're an academic attending, you read lots of notes and write short blurbs. The rounding remains the same for all.
The higher up you go the more time with patients inpt, to a point. The amount of time with patients is sacrificed for volume and notes, this is true for all.
Clinic, the higher up you go the more and shorter your appts, so less time per patient.