Obligation craft is such a weird thing isn't it? Lets be honest, we don't sew because we have to, and if we did have to, we probably wouldn't want to any more.
The main reason I make stuff, I think (and actually, it's the reason I do most things) is curiosity. I either want to see if I can, or want to see how well I can. I have terrible vision in my mind's eye, so if want to see how a quilt will look, I have to make it. That also explains why I dislike binding. It is obligation sewing. It is a necessary evil that gets you to the bit where you can put a quilt in the washing machine and have it come out all crinkly.
Hems are pretty much the epitome of obligation sewing. I can't be the only one who hears the question "hey, you sew don't you?" and immediately thinks great, hems... before they've even asked it. It's interesting to note that most people I will shoot down without any guilt whatsoever (because, hems...) but a friend that has agreed to give you a waxing appointment at 11 at night, you're quite happy to. But then, she said she thinks I'm like the Hulk, cause I don't even flinch when she's doing that bit of the underarm that really hurts. All part of why I love her I guess. There needs to be love, to willingly do hems.
Tassels on scarves need a fair bit of love too, especially on a red and white scarf, as a Hawthorn supporter. Of course, it might not be a Swans scarf (Hi, number two on the ladder, having fun down there?) it might be for a Where's Wally costume. Though I find it hard to believe that a woman who's been knitting for 80 odd years doesn't know how to put tassels on a scarf.
On the other hand, Nana Joy's probably spent the last 80 years deflecting requests to take up hems in favour of knitting blankets, like she wants to. So no doubt she's also an expert at delegating that last little dull bit. When I grow up, I want to be just like her.