The Force and the microbes are separate entities. And yet doing a blood test for them is normal, as if the Force power level is measured in Midochlorian XP. Once again the prequels try something vaguely interesting but muddle it so badly that it never works. Mysticism and biology become blurred making the whole thing reductive and stupid.
Now try and re-write this by saying that they are attracted to a Jedi somehow, maybe that would work. Maybe those who train hardest can absorb more of them and gain mysterious wisdom or something. But claiming that they talk to the Jedi and it never gets mentioned again? Just nonsense.
At the end of the day people like feeling as if they can vicariously live out the adventures of Luke etc. But if you say Luke is only strong with the Force thanks to his high M-cell count because of hereditary traits? Big surprise everyone hates it.
Because the more midichlorians someone has, the better they’re connected to the Force, because midichlorians are the bridge that connects things to the Force.
Also Luke literally says “The Force is strong in my family”. In fact there are multiple lines in Return of the Jedi that talk about how the Skywalker bloodline has a hereditary affinity for the Force (I believe Yoda also says this to Luke), so this isn’t a prequel concept.
It’s possible to read the Force being strong in the Skywalker family being more about how destiny swirls around the Skywalkers, yaddah yaddah yaddah, instead of “The spells we and our dad cast are stronger than other people’s spells because of heredity.”
Even if you don’t buy that, destiny swirling around the Skywalkers is a better explanation for why the Skywalkers have hereditary power than midichlorians, and Qui-Gon and Obi-Wan just being able to feel something along those lines in the Force would’ve been a better way to introduce that in the Phantom Menace.