It’s the smaller youtubers that are more worrisome since they have less money and influence. So the power dynamics are different.
The game is you love it or you dont get special access anymore from us.
This [1] is a fairly great conversation with him which covers a lot of topics including the incentives [2] many other YouTubers/Car Journalists have (from getting flown out to launch events and the general pressures to not lose access to press cars by being too negative in a review)
That said, while I trust Doug far more than many reviewers he still has many relationships with car dealerships, often gets access to preproduction cars that he can't drive yet (but almost always does a full review when he can), and does have a car auction business so there's still room for that to have an effect on his judgement even if he's trying otherwise.
[1] https://youtu.be/pFGh-YqHT4Y [2] https://youtu.be/pFGh-YqHT4Y?t=5155
With a larger organization there is at least peer review and multiple people that would have to keep quiet.
What about cost of repairing and more.