Interestingly, I find that medication does not affect my hyperfocus in a negative way. If anything, it's even easier for me to achieve hyperfocus on a task when my Adderall is "on". I find that what medication helps me most with is the initial hurdle of starting a task. Once I actually get going, I'll usually hyperfocus on it (if it's the type of task I hyperfocus on, which includes programming, but sadly does not include housework). I procrastinate at work far far less when I'm medicated. Without medication, I struggle hard with starting new tasks.
However, I can imagine that some aspects of ADHD - notably the hyperfocus - can be considered a positive trait, something that is hard to let go of. And that's fine, if you want to have it you can skip the medication just fine.
However, you also mentioned RSD; my girlfriend described that the medication she's on helps a lot with daily mood swings. She seems a lot more patient and resilient about small things in the day now that she's on the medication. Do consider it if you find yourself struggling in e.g. the workplace.