So ... do they have reasons to believe it could be scaled up, or do they just hope that it could be scaled up?
Awhile back I watched a video discussing some cold-fusion type effect, and at some point they had a diagram involving stacking like a 7-orders-of-magnitude effect with an 11-orders-of-magnitude effect with another 10-ish-orders-of-magnitude effect, and I was like ... if you could get 30 orders of magnitude improvement on *anything* you could generate power from it. The amounts involved were far greater than the difference between taking a single step and leaping into orbit.
You can't just say "I bet engineers can improve this." Engineers absolutely CAN improve on what you've done. They can make it twice as efficient or whatever. But they can't take your trivial effect and turn it into a launch vehicle (or, more precisely, if they could, they could generally just turn existing larger effects into launch vehicles or power platforms or whatever). Doing Moore's Law scaling tricks involves chaining dozens of strong effects with thousands of trivial effects to optimize things, but it's not magic.