This is a good thing
Communication is extremely important, and it cannot be forgotten that many people make life decisions based on what they saw on TV.
TV has abandoned it's educational role (which is why we have public safety announcements like no alcohol for pregnant woman now), so it will have to be constrained to respect certain things.
As a result, I am entirely for this restriction because I am a bit tired of seeing the same old ads with women doing the same old stuff and men always having the same old role. I look forward to seeing what intelligent ad makers are going to do with this. I also look forward to seeing the stupid ad makers die - but I'm not putting much faith in that.