Bernoulli's Principle only applies if the velocity inside the pipe that has a small hole is so high that it starts drawing air into the hole and not letting any refrigerant out.
Lets just take a low temp running R404a with a -15 evap temp, 20 psig, and a small hole in the suction pipe. The velocity would have to be extremely high to ever reverse the 20 psi gas leaving the pipe and start drawing in air.
For a leak to leak gas out and suck gas in at the same time is completely impossible. You either have to take the pressure inside the pipe down to negative, or get the velocity so high it would create a slight vacuum at the leak(not gonna happen in a refrigeration system, velocity would never get that high). Maybe if you got the pressure down to .5psig you might have enough velocity to suck a little air in, maybe.
The more likely cause of getting moisture into a system would be having a leak in the low side and some intermittent restriction causing negative pressures at times, or a pump down system that is pulling down into a vacuum due to pressure switch set wrong.