> The caste system, as per scriptures, is just a categorization of work that people do.

This is blatantly false. Can you cite me some?

Even the Lord Rama killed Shambuka because he wanted to learn the Vedas as a Sudra.

Another incident I don't remember from the Mahabharata where one person was keen for reaching brahminic status. And that was denied. And was said as an example.

> there are innumerable instances in the scriptures when people have taken up jobs of other castes, as per situation demands.

Cite me two or three.

And please don't say Parshuram being a warrior or Viswamitra being a sage. Both were upper caste Brahmin or Kshatriya.

All religions are bad. Degree varies.