Gravitics in TNE

Has anybody noticed that there's some inconsistency in
being able to focus light by gravitics and not get
propulsion?  After all, one needs a huge distortion in
gravity to bend light.  The mass of the moon only slightly
bends starlight.

To focus a laser, one would need something like a small
black hole.

Yet we can't use this for propulsion?

Scott 2G Kellogg

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