Why would they, if they can profit more from delivering a review that is not aligned with the manufacturer? Case in point.
They get paid in access - you cant make a review if you dont have products to review.
(and envelopes full of cash of course)
Note that this submission is again a counter example. The manufacturer withheld the product and asked the reviewer to wait, the reviewer got access to the product themselves.
Every other review on the channel - manufacturer supplied and supported - is glowing with praise.
No it's not, at least not exclusively; I recall a rolls royce video where he complained that the car has short range.