McDonalds corp cares whether franchisees succeed or fail. Failing franchisees start cutting corners, which results in McDonalds stores which are run down, with poor service and product quality and this harms McDonalds corp's reputation and bottom line. This is the reason McDonalds corp won't let just anybody start a franchise, you have to buy your way into this game by having at least a million dollars liquid, to prove to the corp that you have enough cash on hand to run the store properly. They also don't let a franchisee put the store anywhere they like, rather they choose and develop properties themselves to make sure those locations make strategic sense for the corp as a whole (they don't want two McDonalds franchises sitting right next to each other competing, driving each other out of business.) Furthermore if you want to be a franchisee you have to go through their training courses, you can't just buy a McDonalds franchise on a whim and gift it to your trustfund son. If you want your spoiled son to own a McDonalds franchise, you need to persuade him to go through their training program.

If Taylor machines were actually a real threat to the viability of many McDonalds franchises, McDonalds corp would make changes. It is against their interests for McDonalds franchises to fail and they already employ several severe and strict measures to reduce the likelihood of failure.

If this system seems overbearing, then simply start your own burger shop, or get a franchise from a fast food brand who doesn't give a shit like Subway. Subway will give a franchise to somebody with a tenth as much money, don't care if franchises sit on top of each other, etc. Not incidentally, Subway has an abysmal reputation for consistency, quality, cleanliness and food safety. McDonalds food is crap, but it's crap in a way that is consistent and safe (in the short term; it might give you diabetes but it probably won't give you botulism.)

Or, you know, just invest the $1Mi in a conservative investment fund and get a similar return for way less worries and work

https://www.youtube.com/watch?v=oJpNX_MyvYs