Probably cause curiosity to see how Mohan will reach and save R won over Gungun safety. Plus she was resting/sleeping. 😕 But still not a good idea when she can any time wake up screaming after such experience.
Also leaves the window open for H to harm her in some way. Just have to make Tulsi curious enough to check whether Radha is safe from the balcony so that H can execute his plan. Probably what leads to them calling the doctor in the bts.