Popabarabba; you miss charliehall’s point. According to your logic, why stop at a magnifying glass? how about a microscope? Or how about a nuclear powered microscope? You will see many,many organisms when you use such extreme methods. The fact is that the Torah did not intend to ‘asser’ anything that is not “nireh le’eyaynim”.Our skin crawls with bacteria and so is fermenting wine, yeasts, etc. virtually everything in the world. So, we shoulf stop eating anything and everything?
We are human beings and ,as such, we have to give it the attention that we can give it, as per normal day-t-day methods. Not magnifying glasses, not microscopes and certainly not outlandish behavior with fruits and vegetables.
And your remark as far as bugs being present now, this is disproved by the halacha that does NOT asser any bug that has hatched inside a fruit and has never seen daylight.