This has the fantastic parallel to Kintsugi. I also repair my own clothing like OP, but I just yesterday created a big horizontal tear in a pair of shorts I enjoy wearing and will try repairing them like you've linked here, it looks really nice!
I also have a rather difficult time finding decent jeans in my correct waist and length, so I've taken to hemming my own pants and while the first time was terrifying (I'm cutting off the bottom of a perfectly good pair of jeans what if I mess up!?) it turned out amazing and I look and feel SUPER confident in the altered pants. So I recoimmend to anyone to give hemming their own clothes a try, maybe starting with a pair of pants that you'll repair like OP's anyway, you can't screw it up much worse anyway!