Look, OP, I really don't think you should let yourself get scared or upset by the maladaptive daydreaming label. For a start, it's just a bunch of strangers on MN who know nothing about you or your life in reality. On other threads, MNetters with no specialist knowledge confidently diagnose autism or narcissistic personality disorder in people they've never met.
Secondly, maladaptive daydreaming isn't necessarily the 'serious' disorder' it's being touted as, although clearly in extreme cases it can be. I am a maladaptive daydreamer in the sense that for me it began in childhood as a mechanism to cope with trauma. At this point, its an ingrained habit, a comforter, like any of the things grown ups treat themselves to when they feel stressed or down. In many ways, it's an excellent tool, as I use the detail of my daydreams to help me pinpoint areas of dissatisfaction in my life and make change. It sounds as though you're doing something similar, so that's fine, and a lot healthier than if you were comforting yourself with large amounts of food or alcohol or a real life love affair.
The only reason it feels like a problem is because a percentage of other people don't do it, haven't done it, don't understand it and want to pathologise it based on a smattering of internet reading. But lots of us do, and we're telling you this isn't unusual, needn't be problematic and definitely isn't anything to feel guilty about.
I expect masturbation was viewed similarly back in the day. 