I keep reading the word "analysts", but how trustworthy are those analysts. How do we know they are neither in microsoft's nor in Apple's pockets? Those analyst

I keep reading the word "analysts", but how trustworthy are those analysts. How do we know they are neither in microsoft's nor in Apple's pockets? Those analysts certainly wouldn't disclose their affiliations because of NDAs. So I suggest having an NLP algorithm (natural language processing) to distinguish PR trolling from trustworthy independent opinion.