Considering that the longest distance of 1750 meters is roughly 1 mile in radius, that gives a coverage area of 2 miles diameter which is at or beyond the safe working limit of most standard radio sets. The other factor is flight time, if you generously spec the flight speed @ 30 mph it will take 4 minutes to cross the 2 miles and 4 to return which is close to the limit for a lot of heavy lift multirotor craft that might be interested in long range capability. That gives you little to no time to spend at the destination before you have to return or risk running out of power on the way back. Effectively this is as far as a typical multirotor craft can fly and there's little point in increasing the limit beyond that other than to say it has the capability to do so.
If you compare the pricing that MK is charging for the max distance to what the total cost is for a similar capability from DJI you'll find the overall cost to be about the same maybe even a bit more expensive from DJI. DJI doesn't "limit" the distance that their waypoint software will work at, but they don't have to, the flight time capability of the multirotor does that for them. DJI can make the claim that their waypoint doesn't have the limits that MK does but if you look past the marketing spin you see that it will cost about the same regardless of which flight controller you use and the software distance limitation really is nothing more than marketing spin on either side and a way to get more $ for what they're selling.
Ken