Basic Physics. If you don’t have sufficient lift without the ramp, you sure won’t have it with the ramp as the ramp will slow you down!
In fact military studies for the design of land-based jets had them leaving the ramp BELOW minimum speed for level flight.
I don’t condone it but they do it LOL
My point is it was a short runway.
And sometimes the theory is to stop you from hitting the sea.
Flying some of these places is scary with chickens and goats.