This is not a valid argument.
Michael Jackson had a litany of babysitters, nannies, etc, to take care of his two children so as to freely focus on the making of his new album.
He made it clear that his children would often get sick, as children often do, and that he would subsequently catch colds from them. This was what kept him from finishing the album sooner, according to himself.
And, while he most certainly had many babysitters and nannies, I'm sure he wanted to spend as much time as possible with them and was likely distracted from his work because of this. He couldn't direct his attention fully to his work, as he had previously, because now he had another thing in his life which he cared about so very much.
Complaints towards 'Whatever Happens' are more directed towards the fact that Michael Jackson basically covered the original demo.
When 'Whatever Happens' was released it was received with praise by many of his fans.
But when the original demo later came to light, many of his fans became extremely disappointed, and they felt that Michael Jackson cheated them.
Who? You may be disappointed yourself, however, there is no reason to be disappointed. If you listen to the demo of "Human Nature", you will notice the same thing, a song written and sung by someone else (Toto) which was given to Michael and "covered" by him.
Nothing out of the ordinary, at all. Sure the lyrics on the demo are somewhat different, but that's because Steve Porcaro hadn't finished them, and that's probably not the final demo either. Michael didn't have a hand in the lyrics or melody at all, though, just the same as he didn't in the lyrics or melody of "Whatever Happens". I don't see what the issue is. How about the writer's demo of "Carousel"? Just the same thing.
"He basically covered the demo song"? That's how it works when you record a demo which was written by an outside writer. You don't necessarily re-write it, if it satisfies you as is.