"The entire point of the layout is to keep your fingers on the home row."
No, that is how you're told to type. You have to be told to type that way precisely because QWERTY is not designed to keep your fingers on the home row. If you type in a layout that is designed to do that, you don't need to be told to keep your fingers on the home row, because you naturally will.
Nobody really knows what the designers were thinking, which I do not mean as sarcasm, I mean it straight. History lost that information. But whatever they were thinking that is clearly not it because it is plainly obvious just by looking at it how bad it is at that. Nobody trying to design a layout for "keeping your fingers on the home row" would leave hjkl(semicolon) under the resting position of the dominant hand for ~90% of the people.
This, perhaps in one of technical history's great ironies, makes it a fairly good keyboard for swype-like technologies! A keyboard layout like Dvorak that has "aoeui" all right next to each other and "dhtns" on the other would be constantly having trouble figuring out which one you meant between "hat" and "ten" to name just one example. "uio" on qwerty could probably stand a bit more separation, but "a" and "e" are generally far enough apart that at least for me they don't end up confused, and pushing the most common consonants towards the outer part of the keyboard rather than clustering them next to each other in the center (on the home row) helps them be distinguishable too. "fghjkl" is almost a probability dead zone, and the "asd" on the left are generally reasonably distinct even if you kinda miss one of them badly.
I don't know what an optimal swype keyboard would be, and there's probably still a good 10% gain to be made if someone tried to make one, but it wouldn't be enough to justify learning a new layout.