Actually its not silly. Round laces don't stay tied as well as flat laces. Sometime in the last 20 years all the sneaker companies switched over to round laces, I have no idea why. Are your laces wearing out on the metal hooks up near the ankle? I have gone through countless sets of laces (2 or 3 per season) due to breakage on this part of the boot.
I have switched over to workboot laces (the yellow and brown ones). They last a little longer but are still round. They do stay tied a little bit better.
The other suggestion would be to go over to a boot that uses plastic hooks/hardware on the boot. My Orvis side zips have plastic hardware and the laces seem to slide through the hardware with alot less friction. The original laces have almost a year on them.
The last suggestion is to try a boot with the BOA system. No laces. Never tried it but everyone who owns them loves it.