After testing several option I decided to opt for an intermediate solution given an extra variable.
I realized that when the shower curtain is close while showering the light turns off because the sensor on the ceiling does not register any movement.
So the option of showering with the curtain open or change it to one transparent is not that appealing.
I decided to add a motion sensor on the roof of the shower working in tandem with the bathroom one.
I let any sensor to trigger any event and then I used the and and or operator in the action using the ´choose’ action based on the sensors status.
In essence if the two sensor are both off —> turn the light off
If any of the sensors is on —-> keep or turn the light on.
To the next challenge
In this way the automation is triggered only by the sensor change status and nobody has gets the soap in the eyes.