This is bollocks.
Edit: To qualify, I think you are giving them too much of a get out clause for what is inherent and clearly different framing of two similar incidents based on race whether conscious or unconscious. The Raheem Sterling coverage wasn't just the bathroom but countless articles where the same issue would be represented differently with a white footballer. I'm no real fan of Raheem Sterling from a footballing point of view, but he was/is treated differently to some of his white peers in the framing of issues in the press. Plus a lot of these articles come from the same newspapers, so you'd hope they have editors or sub editors, or at least someone who looks across their output to see if things are framed consistently. To just say it's different people writing the articles isn't an acceptable excuse, especially when reporters are often told to look for negative articles that they can put together about certain individuals.
The same is true of the articles around Meghan and Kate. There has been a clear difference in the framing of the two of them. There is more than enough evidence out there that you could probably put an entire dissertation together about it. It persists still today.
I'm not particularly bothered about the royal family and don't think it should exist in 2021 so I don't really have a dog in the fight. The evidence is out there and it would be better for everyone if we admitted the problem exists rather than putting forward these half arsed excuses to pretend that they don't.
It may be bollocks, and you are entitled to your own opinion, as I am mine.
However, we are fortunate that we live in a country where we do not lock people up and throw away the keys based on a "feeling".
Where there are clear examples of racist articles that relate to either Meghan Markle or Raheem Sterling, then these should be called out and the people responsible for writing them suitably punished.
An article does not become "racist" just because it is nasty and makes you feel uneasy. Unfair means unfair. Unfair does not mean racist.
It is worth pointing out that these articles are often quoted in conjunction with some undeniably awful racist social media posts. This is the unfortunate side of social media, as we are all too aware. In a world of millions of people, it only takes one or two bigots to post outrageous comments, to sour things for everyone. But that does not make the news/article they are commenting on, inherently racist in itself.
I'm not one to defend papers such as the Daily Mail. They are after all, notoriously misogynistic. Perhaps that is the route of their bigotry? Don't forget that 10 years ago, Camilla spent a decade has the most hated and vilified person in Britain. Before her, Sarah Ferguson ("Princess Porky" etc) was. Both women ridiculed and maligned because they paled in comparison to Diana.