It is, but how can you be sure it's been checked? How can you make sure someone's not trying to manipulate facts for his/her personal gain.

Well, I think admins are filtering information. Or just you'd better find a site that everyone trusts in
Any source you could suggest?
Or should I rather pay a data engineer to get a trustworthy information at this point in time
You do not have to pay anyone. Maybe you should just analyze some data from different sites and decide for yourself to whom you should trust