curiosity;your point is well taken. In reality bugs would only be ossur if you can see them with the naked eye. Using any artificial means (even glasses) really do not make them “ossur’ because, very simply, if you use artificial means- “ein ledovor sof”. Why stop at glasses, magnifying glasses, microscopes up to the most sophisticated magnifying microscopes.
Nonetheless, a “ruach’ of “chumros’ has taken root in recent years and so, you have all these convoluting means to ‘clean’ vegetables.
In practice, I do the normal thing like soaking in salt water, rinsing the vegetables carefully and if you so require-repeat.
You cannot require the masses to go to abnormal length as we are not angels.