Why do you think SJWs are taking over fandoms?

For instance, Magic the gathering and Marvel comics have now become "progressive" , and now Warhammer 40k is also slowly being infiltrated.

Why can't they leave the fandoms as they were? Why do they insist that these fictional universes just have to be diverse and full of "empowered" women and what not?
Why do you think SJWs are taking over fandoms?
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