"Why do you make your own gear?
What do you get out of it"?
Hunting, fishing, running, sailing, carpentry, racing, cycling and golf can all be termed as hobbies for us regular folk who do it for the fun of it and not in a pay for play professional capacity.
Currently my hobby is hiking with a side order of MYOG. Mechanical repair was a side order served up along with my auto racing hobby years ago.
I find it humorous that the term "gear head" seems to fit well in both genres.
I've done tarps, a bivy, packs, quilts, stuff sacks, pillow cases, stoves and windscreens. I've used all of it succesfully.
FWIW I've sold some of my MYOG and some little used manufactured gear to help fund my current shelter from Lightheart Gear.
Bottom line, I enjoy it and I get requests from family and friends for some of my MYOG. That's why I do it.