Tinkering is much more a "male" thing. But, women are becoming more and more adept at using the tools required for tinkering, and so it becomes easier.
Not a lot of women are all that comfortable with powertools and electricity. But, as it becomes easier and easier to purchase the equipment, rather than to have to build it yourself. I think that more women become comfortable with the gadgets that the CO2 supplemented tank comes with.
My own perspective is from seeing my kids, one of each, the girl is happiest when she has followed instructions and done something correctly, or quickly, or elegantly, or for less money, but the end is the goal. The boy is actually more concerned with the process, he takes more joy in doing something in a novel way, improving on it somehow. His room is a collection of bits and pieces of things that may or may not be finished. Hers was a collection of things done. I can't say that I see the same drivers at work here, for gender isn't always apparent and individual differences are actually greater than the gender effects, with age and experience being very important.
The gadgetry of CO2 is daunting, but it is easy for the not-gadgt-inclined to get started by purchasing Excell, then a Hagen, then either DIY or straight to pressurized, as one sees the results of CO2 in the tank.
Personally, I didn't think it was possible to grow plants in my water based on how the plants I first bought fell apart in my tank without CO2 but recently I have seen tanks that grow OK without it. I have not been able to do that, the algae takes over.