I genuinely don’t want too stop my MD, I see it as a hobby and it accounts for most of my exercise. Is this an issue?

I’ve been MDing for about 2/3 years now, and genuinely it’s one of my favourite things, I listen to music and have this totally alternative world I fall into for hours at a time, I’d say maybe 4-5 hours a day and my ‘character’ has a perfectly detailed ‘fact file’ that I’ve spent years compiling, so when my therapist called this maladaptive daydreaming, I thought this subreddit would have people sharing their characters/ ‘plot lines’, I didn’t realise this was something people wanted to stop because I love it so much, Is that bad?