I don't think it's right to call what you're describing "scientific discourse," it's more like "popular discourse."
>scientific thinking is difficult and not for everyone
There's no difference between scientific thinking and careful thinking. In fact the main strength of science is that anyone can eventually reproduce the conclusions, it's just that some people would take longer than others. If it was a priesthood of oracles who could, alone, speak to nature then you couldn't reasonably expect the non-oracles to believe any of it.