Do they absolutely have to put a person of colour in every commercial and every movie now?

Why would it be considered racist if they put only whites from time to time? In that recent Coca-Cola commercial, you see a group of Asians eating at a table and a group of blacks eating at a table. And when it comes down to the white group, you have blacks mixed in with them. Why?

Do they absolutely have to put a person of colour in every commercial and every movie now?
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