Do you think there could be any law or measure that would effectively promote gender equality?

No.
You can’t govern people’s emotions and hearts.

There needs to be laws to try and protect people as much as we can.
We need to be cautious we don’t go too far and damage our cause.
But more importantly, we need to work to make sure we raise loving, caring, and empathetic children. They’ll grow to be loving, caring, and empathetic adults who hopefully will live lives that don’t need laws to tell them not to judge and discriminate.