Because time after time the majority of these have turned out to be bad actors buying up old licenses, putting a few thousand into marketing and deceiving a large audience into buying into a vision of a console supported by hoardes of indie developers.
It's a narrative that has played enough times that it warrants at a minimum skepticism.
Like it or not when you do writeups based solely on the press release it lends credibility to the project. Personally I think a little diligence and curation would go a long way. Most these projects end up being funded when these sites all run to be first to publish... nobody actually spends time investigating whether the people involved have track record or whether claims are even reasonable... all of a sudden overnight it's funded... that sucks.