This is not true at all IMO. All that is required is for the reviewer to state their experience level from the onset. Marketplace assets are bought by a range of skill-levelled individuals, so having reviews done by people new to the experience has it’s own value, as long as it is clear from the beginning of the review that the person is likely missing large sections in their skills, and so any comments they make should take that into account.
To say that you need someone with years of professional experience is kinda like saying game reviews are useless unless the person you are taking the review from is a proven champion at that game genre.
Reviews should always be taken as what they are - an opinion of the content being reviewed through the filter of the reviewer, including their bias.