They're looking in the wrong place. KJV says "mountains" of Ararat, indicating either a range of mountains by that name or mountains in a region called "Ararat." They're looking on the "mountain" (singular) of Ararat.
Plus, the summit of Mt Ararat is more than 15,000 feet above sea level. Where on earth has evidence of flooding 15,000 feet above sea level in the last 5000 years ever been discovered?
Misinterpretations and mistranslations happen.
Scientifically, it mandates exploring both possibilities.
I’m not labeling this as ‘it’, but merely interest in the study thereof.