Once you understand the fundamentals of trading and know how to execute orders, there is no use wasting time in a simulator when you have no idea how you are going to psychologically react to your system in real time.
This is to respond, and add to, posts where you suggest spending less time in simulation.
When a person is threatened financially or physically, the body's response is to enter fight-or-flight mode. In it, one prepares to confront enemies; blood flow to the brain and extremities is reduced; thinking, planning and decision-making are impaired. This is the reason for deer-in-the-headlights syndrome: failure to act appropriately, for no apparent reason, under stress.
One wants to avoid thinking, planning and taking action in the fight-or-flight stressed state.
I read your suggestion to avoid simulation to be: "Experience and learn to deal with the fight-or-flight mindset, because it's not part of your training. You need to be more effective there." You're right!
The simulator can help grow the envelope of experience, moving thinking away from the trading moment into pre-planning, and committing behaviors to mental and muscle memory. That is one of the best uses and purposes of the simulator.
Whether the simulator is useful may depend on what you do in a trading day. If your actions are mostly predefined -- when the signal triggers, trade or exit -- maybe it's not important. If one is constantly in an observe-analyze-think-plan-execute cycle, then reducing mental workload is important and the simulator has a role. Just my 2 cents.