Sometimes, though, the people you’re trusting to be objective have been swayed by ads themselves! It’s honestly impossible IMO to be completely unaffected by ads because of that.

And even if the reviews are objective ads might have an effect on what products get reviewed. Or what products stores are likely to stock etc.

So even if you try to be objective yourself and do your research you may never even be aware of some competing product or it just isn’t available.