Are you suggesting someone meddled with the śruti? .. The śrutis came centuries before the advaitists at any rate. .. Why would i want to convince you of anything else? .. It is very much a possibility that tomorrow's science itself may not agree with today's. .. Exactly, which is why unitary-homogeneity of everyone and everything as proposed by māyāvāda is untenable.
Advaita also is as old as 'Shrutis'.
"इयं विस्र्ष्टिर्यत आबभूव यदि वा दधे यदि वा न l"
Eyam visritiryata ābabhūva yadi vā dadhe yadi vā na ..
He, the first origin of this creation, whether he formed it all or did not form it, ..
"हिरण्यगर्भः समवर्तताग्रे भूतस्य जातः पतिरेकासीत l"
Hiranyagarbhah samavartatāgre bhutasya jātah patirekāsita ..
IN the beginning rose Hiranyagarbha, born Only Lord of all created beings, ..
I do not know how many thousand people heard what is given in shrutis. The Vedas, the Mukhya (Principal) Upanishads, the Aranyakas, the Brahmanas. And what was the time period when these revelations came. I consider Vedas to be at least as old as 8,000 years, and the last revelations must have come before 1,000 BC, a period encompassing at least 5,000 years.
"It appears to me therefore that the oldest Vedic calendar like the oldest hymn, was sacrificial; and that the sacrifice or the year commenced with Aditi at the vernal equinox in or near Punarvasu." Bal Gangadhar Tilak,
"Orion or the Antiquity of Vedas", Page 205.
That is why Aditi, the Goddess of Punarvasu, is the Mother of Adityas. That is why Taittirya Samhita termed Aditi as the beginning and end of the year (Ubhayataru). That is why they said Aditi is the Samvatsara (the Yajna cycle).
Of course, we have different views and there is no question of our changing them. We both have come to them only after our different studies. If science tomorrow tells something new and I am still here, then I would change my views. Though generally science does not throw away all its views but only modifies them, like it happened with the Theory of Evolution or Relativity. It is not that the theory of unity-homogeneity is untenable, it may be very much so, but still people have the right to have different views.