Why YSK: The granny knot is the most common reason as to why show laces seem to be undone so easily. It’s caused when the Starting Knot & Finishing Bow don’t “balance” each other. Recognizing this can help you make your shoe knots much more secure.
Edit: (BTW, YSK the website as well. It’s a really good resource for tying and lacing shoes)
Yes you can change how you tie your shoes. I’m in my 60s and I started tying my shoes with a square knot bow instead of a granny knot bow just a few months ago, and my laces haven’t come undone once. It is a much better system than the extra knot for keeping the laces tied. It’s surprising how so many things we do are unexamined, even when we try to question things and why we do them