Answers in blue.
In almost all religions, the hardest one to reason with are those that are rooted in their religious egos.
Religious ego thinks it has to defend his/her God with its beliefs.
Lets rephrase this:
In almost all fields, the hardest one to reason with are those that are rooted in their intellectual egos.
Intellectual ego thinks it has to defend his/her perception.
This is usually seen in high performers intellectual type and usually mistaken as high IQ or confidence/capability but its is actually a Disorder known as Pathological Narcissism or in lay man terms Pathological Arrogance.
When it comes to learning the universal principles taught in our scriptures every one is an Aam-Admi.
True...you included in this Aam Admi list!..no matter what you might want to project about your perception about Ishwara/Brahman/Allah.
A better metaphor to communicate this point is that is we all are afflicted by an epidemic of ignorance. One should cure oneself before thinking of curing others because it is possible to seriously infect others even more with wrong ideas. The only realistic question is if it is possible to understand what is taught.
Its the hardest to self diagnose and treat self but as human we should not try to play Beshajam Bhava Roginam(Physician for the Ailment of Existence) by judging the mode of prayers of others.
By telling people some mumbo jumbo about vibrations of chanting etc there is perpetuation of ignorance.
Words/chanting are sound waves...sound waves cause vibrations of medium.
So why do you feel its ignorance to state that chanting can have vibrations?
Also this meandering about what each Acharya may have said is unnecessary. Why should one believe an Acharya who says to believe in Vedas. The reason Sri Sankara is taken seriously is not because he is deified but because his writing can be understood here and now. Here the understanding is not limited to just a mental activity though it includes that.
Human existence is endowed with an enormous gift which is a faculty of discriminative thinking. Dulling that for anyone including those who are condescendingly called Aam Admi *in this context* is a serious disservice in my view.
Now this is where we have to get real...yes..we humans are endowed with intellect/Viveka/Discriminative Faculty BUT as long as it functions!
Its easy to imagine about understanding Ishwara etc when we are still having normal cognitive functions, what if we lose it in an accident becos of brain injury or get dementia and even forget our name?
That time when there is no reachable memory or cognitive function..what happens to our so called high thinking capability of Understanding Ishwara?
This itself shows that the MIND can NOT be the means to even grasp the understanding of Ishwara cos if something as the mind could be subject to disease or degeneration that shows that the mind was never the endpoint for understanding the Ultimate.
So what is the endpoint/ultimate for an understanding of Ishwara/Brahman?
Do we really know? Can we really know with senses and intellect?
So finally at the end of the day..if one choose to do a 700 stanza Geeta homa with faith or one chooses to try to understand Ishwara there is actually no difference cos both chose to go thru senses and mind both means that are subject to decay or disease.