Anyone who is to develop a sense of safety in controlling flight operations on an aircraft carrier should be disturbed by such false foul lines. I cannot imagine such a thing in a professional simulator.
I agree to an extent but it also depends on how complex the simulator is meant to be, namely whether they simulate the ability to taxi, park and spot aircraft on the deck.
If it was only to familiarise the crew with takeoff and landing in isolation at this stage, I could somewhat understand why representative foul lines was disregarded or ignored.
We will know in time once the carrier undergoes the later stages of its sea trials where flight markings would be painted on.