Stick to power. You don’t know enough about gliding to pontificate on it.
I know that and airframe will glide the same no matter if you have an engine at the front or a lump of concrete and as I pointed out you in your own explanation used the "point" from "point and power" to land your glider!
The only thing an engine gives us is the thrust force acting along the thrust line which we can use to maintain a constant airspeed without having to rely on gravity.
Regards,
DFC