For the same reason as the Bible and theology have been talked about for centuries.
New people enter the conversation and start 'new' ones, rather than rehashing 'old' threads, or caring to look them up.
For the same reason Buddha spoke about phenomenology in 2500 bce and some fat white guy 'discovered' it in the late 1800's.
As my 93 year old friend Milos says,'Benny, my young friend, there is nothing new under the sun.'
This first struck me as hopeless and negative, but the more I thought about it, it is true in many many ways, and positively speaking, everything we'll ever find that hasn't been brought to light,is already here to.
"We can walk over treasure for a thousand years and it's only inches below our feet." -Yogananda ( and probably a million other people )
I hear where you are coming from Veda, but haven't we all read things again and again, and maybe just maybe found something new in the words, or within ourselves. A new thought to bring forth our expressions of understanding?
Blah....I've said that before
Or someone has
supramundane
Sage