It only meant that Hera's men had already thought several steps ahead; they knew exactly how to control their strength and calculate every strike with precision.
In this way, Hera's bodyguards wouldn't give their enemies any chance to exploit the situation or use their injuries to cause trouble for Hera, such as reporting her and her people to the police in an attempt to get them jailed.
Silvia could have used that as a way to get back at Hera and reclaim some pride after being humiliated, but unfortunately for her, that plan was doomed from the start.
Sure enough, after fuming for the entire elevator ride, Silvia thought of reporting Hera and her men for assault. However, when she learned that while her bodyguards were in pain, none of them had any visible bruises or marks of being attacked, she realized she couldn't use that angle.
