Nothing on the page says they are all reviews from producthunt, nor that the testimonials are all from public sources. I get being skeptical; my default assumption tends to be that testimonials are not to be trusted, but this seems excessive.
Here’s a tip: if you modify reviews for “privacy reasons”, there is literally nothing separating them from a fake review.
This is not how you build trust. If someone accepts being listed as a review there is no privacy concern, if they do not they shouldn’t be there at all.