It sounds like the parent comment is saying they may benefit from NOT doing this. They say they have a million unfinished projects, but if you just GO without a plan, sometimes the momentum fatally wanes when you hit a point where you realized you've painted yourself into a corner.
I'm not saying a completely fleshed-out design document will help, but maybe a rough roadmap with milestone release dates would help keep the projects on track.
Yes! Projects develop organically, with many stop gap solutions and temporary scaffolds built and torn down along the way. Rome wasn't built in a day.