Stereotyping: is it really necessary?

We have all seen those ads where the company stereotypes to get their message across. But is it really necessary to do this? I feel depending on the ad depends on whether its right or wrong to racially stereotype. This is because if it's doing it in a friendly way where they mean no harm than I don't see it as a bad thing especially since we do it on a daily basis. So why should the Ads be punished for doing something that almost everyone does? However, if it is doing it in a way where they mean it in a negative way than i feel that stereotyping isn't necessary to do since it will give your product a negative vibe.
I believe that racism in advertising is not a thing in the past. However, I think they are much smarter about it and so it doesn't stand out as much as it used to. in this ad of Beyonce she clearly gets whiter in each scene. As if Loreal is saying that in order to be beautiful you must be white. This is just one of many examples of racism in advertising.
I think that advertisers do have ethical responsibilities because if they didn't then i think more ads would be poking fun at everyone in a negative way. By having those ethical responsibilities, it makes it so they have to be careful with what they do or say.