Honestly, I can see both sides of this. In my house, it's the opposite. My husband is fine to wait until whenever...or never...to do things and doesn't finish what he started. For example, the ceiling leaked above "his" desk in our family room two years ago. The stained, bubbling, peeling paint has been hanging over the space that he spends 4-6 hours a day in for two freaking years! I couldn't do the repair myself because his precious aquarium is in the same space and God forbid we disturbed the fish. Finally now that he had to complete drain the tank due to all of the fish dying of a disease he started the ceiling repair. It's been two weeks and it's only half done. Another time he randomly decided to resurface the perfectly fine concrete patio behind our back door but only did about 1/3 of it, got bored and never finished. I think it's been three years that we've had two-toned concrete.
So...try to see the upside - at least he gets things done, and when he's in over his head, recruits you to help rather than leaving things undone. There are plenty of spouses out there who do nothing at all, and some like mind who drag their feet and when they do start something, don't finish and don't ask for help. Hopefully the projects that he takes and recruits you for are things that benefit the whole family and that after each is done, even it was a major inconvenience, you can at least be glad that it is done.