Exactly! Spot on! When making using light there is a limit called the "shot noise limit". It's basically the limit we can reach of reducing the noise in the measurements. The light when detected when making measurement arrives at the detector in a "pitter patter" rather than a smooth continuous sinusoidal fashion. There are techniques to reduced this noise, we must "squeeze" the light, this puts more uncertainty in the amplitude but increases precision for the phase, or vice verse. However the Heisenberg uncertainty principle will always be there making everything in life uncertain hahaha.