If someone fundamentally disbelieves in the existence of microbes, no amount of microscope gazings will convince him: "Ah, that's just made up, the same way stuff can be photoshopped in still images or videos." So, axiomatic for the believer in bacteria, viruses, etc. is the existence of those entities. Even the scientist has a type of faith.
It is intriguing to note in this connection that as early as the 6th century BC, the Jains already postulated the existence of unseen microbiological life. Just imagine if they had introduced that concept to, say, the average non-Jainist chieftain at that time: at best they'd have been laughed out of court, or at worst, put to death as some sort of blasphemers.
Now, supposing that there is another unseen realm, an unseen dimension, surpassing the scope of telescopes and microscopes---or any other "scopes" for that matter. The uniformitarian, entrenched in his metaphysical naturalism, scoffs at that concept in the same way as the above-mentioned disbelievers scoffed at the possibility of the microbiological realm. These scoffers are akin to the colorblind dolt who pshaws his neighbor's rapture at the blazing sunset, or to the tone-deaf wretch who has contempt for the man enthralled with the magnificence of Brahms' violin concerto.
Pity that metaphysical Philistinism prevails.
