I think the point was just that the more we investigate any given area of science, the more we refine and overturn previously held ideas. I think the GP's wordi

I think the point was just that the more we investigate any given area of science, the more we refine and overturn previously held ideas. I think the GP's wording was a little hostile toward scientists in tone, but I also think that may have been unintentional, based on the second sentence. Science is constantly improving on current ideas, which is great! Let's keep doing it!