Then why do so many PhDs in so many fields disagree with one another?
That's what we call "begging the question". Who says "so many" (how many?) people with advanced degrees in the natural sciences, but in "so many" (how many?) different disciplines mutually disagree? You assume, without evidence, that this is the case. Define your terms (How many is "so many"? Is that number significant? Why?) and then prove your assertion. Provide evidence.
Or just admit that you're blowing smoke.
BTW, the controversies over "global warming" and "evolution" show what happens when politicians and philosophers (I'm being generous) attempt to draw conclusions which exceed the scope of available evidence, and in fields beyond their expertise.
Now why you bein' dis way?
I did not bombard YOU with questions to prove your assertions.
Let'st say we're both right in these matters and quit this nitpicking before we REALLY aggravate one another; ok?