I do a couple of crafts, but so far people haven't been too demanding. A friend asked me to make a couple of specific things for her son's birthday, but gave me a lot of advance notice and wasn't overly detailed, and they were definitely considered to be my gift for him, with nothing else required. Any "commissions" people ask about, I usually shut down right away, because I just don't work that way--I have to go with what I feel like doing, when I feel like doing it. Otherwise it becomes an obligation and not fun at all, and saps my creativity.
I agree that people have a fear of sewing, though. I make stuffed animals (freehand) and sew the occasional button back on my clothes, both instances where I am definitely not going for elegance, just whatever works. My mom is more of a patterns person but my mind gets boggled trying to follow them, I just don't think in 3-D very well.
I do think people who don't do certain crafts/creative things underestimate the time and effort they take, and the materials, too. For example, if someone asked me to make them a beaded bracelet using beads like X, Y, and Z, I would probably have to go out and buy a packet containing a dozen of each of those beads, in order to use three of each in the bracelet. Granted, I would then have those beads to use on other projects, but who's to say when THAT will be? If someone asked me for something at that level of detail, I would probably say, "Well, I could make you something in those colors, but not exactly with those beads, because I'd have to go out and purchase them special, and that would drive the cost up. If you're more flexible about which beads are used, you could have the bracelet for free/low cost." I don't blame them for not thinking about that if they don't do that hobby... as long as the conversation stays polite.
Fortunately I've not had anyone ask me to write something for them specifically, because I'm not good at doing that at all. My problem there is people who think creative writing by non-professionals is weird, and don't appreciate how much effort and joy go into it.