my point is that, a photon bouncing off the system doesn't suffice as a measurement, because photons and electrons are always interacting with the system, but t

my point is that, a photon bouncing off the system doesn't suffice as a measurement, because photons and electrons are always interacting with the system, but the measurement/wave function collapse doesn't occur until there's some other type of observation that occurs, e.g. a photon that's specifically sent and read by the experimenter