Earlier quoted context omitted.
You don't seem to understand what I said. Dawkins is another example of the old scientist pattern - many successful and famous scientists do the work they're academically known for early, then shift into topics outside of their original area. It's quite natural. The link was from fans of Chomsky's and simply illustrates that he has shifted his attention away from linguistics for many decades now. This is not uncommon…
But Chomsky didn't change when he was old. He became well-known for his politics when he was in his 30s. Dawkins was 35 when his "The Selfish Gene" was published, and 45 when "The Blind Watchmaker" was published. Both are involved in areas that interested them when they were under 40 years old. My point is that neither Chomsky (and now neither Dawkins) fits your description ... unless you say that people 30-40 of age…
I have never made a generalized claim about all scientists so you are beating a straw man. I have mentioned a certain pattern which you will see recurring if you have any significant awareness of the famous scientists in a particular field... that pattern is not "getting into politics" but rather "moving well beyond the scientific area where they made their name"