Good Luck with that marketing.....
A 747 has a 15:1 glide ratio, so if they’d just run the fuel tanks dry at 45000 feet and glide the rest of the way in, they could get another 110 nautical miles of range out of it - a 1.5% improvement. If they left off the landing gear and just pulled a Sully in the nearest river every flight, that’d save thousands of pounds of weight increasing the range even more - the tires alone weigh over two tons.
Lamenting a loss of throw weight when you’re able to reuse the launch vehicle is like lamenting the loss of range imposed on your 747 from having to carry tens of thousands of pounds of landing gear.