Question

why society might initially reject a new scientific theory

Answer 1

Not enough evidence to support the theory.
Goes against what people have been taught since they were young.
People are uncomfortable with change.

Answer 2

corporations with short-term agendas, lobby the politicians

Answer 3

The media will mis-understand and so mis-report what the theory "really" means.
uncleR, I think "society" tries to ignore the corporate-bought politicians.