Oh really now, they're not that hard to cut.
None of the squashes are and I have had to cut, peel (which is worse), cut into smaller pieces, then toss that in the food processor for my turtles. This isn't one squash - more like 5 or 6 at a time and with relatively dull knives.
You have to poke the squash with the end of the knife first, slowly work it in, then slowly cut around it. Using the knife more like a lever. If you're worried about breaking a kitchen knife, get a larger buck knife/hunting knife to do it. If you try to use a chopping motion - straight down and across the squash with the knife, you're just increasing the surface area and tension against the knife which means you'll need more force.
DH likes spaghetti more than I do. I prefer acorn and butternut. Which can be prepared like any vegetable - even with some seasonings on it like you would a potato.