Why must the mind be so rigid? We have a lot of plasticity and adaptability, and it's likely that various patterns will similarly trigger very basic processes in different people.
No offence but, I wonder how much of what you mean by 'rigidity' could be ideological and how much philosophical. The assertion of an intellectual principle or a rational ideal would certainly place limits upon the legitimacy of subjective human opinions. And if one were to be desirable of simply the largest quantity of opinion without regard to their ultimate worth, then I would agree that such principles and ideals would militate against such an outcome. But it seems that one will pay for the indiscriminate plurality by receiving a diminished view of the nature of reality itself, whose view can only be obtained by an appeal to philosophical principles of reason.
Inidividual things do not go on endlessly in the human mind without leaving us eventually blinded and spinning in the head, as it were. Each measurable moment of 'being' that the human brain feels cannot be so different from each other as to deprive us the ability to understand them. And such logical classification of recurring elements as they appear in the world should point us to such principles that are, as principles, seperate from the reality of which they serve to deliver to us a clear understanding. These are the principles of basic reasoning.
But, in my opinion, everyone (including academic philosophy professors) is now in the habit of classifying speculative philosophy i.e. metaphysics, as being the same thing as, let us say, some sort of intellectualized Christian theology
, and therefore apply such political and social pressure, with their concomitant guilt and shame, as to ensure that we all remain blind and irrational. They have already succeeded to a large extent. This is an ideological mission and not a genuine philosophical conversation.
My conclusion: metaphysics is intellectually incorrect
therefore being human is intellectually incorrect.