I agree with this.
In fact, just yesterday I was working with a student, and he asked me about prethinking.
He had been doing somewhat better as we worked on Critical Reasoning, but he still was finding identifying the implications of choices somewhat challenging.
When I suggested that prethinking answers could be slowing him down, he wanted to confirm, saying, "That's so interesting to hear because everywhere I see people recommending prethinking."
The cool thing is that, once he heard that prethinking answers wasn't necessary, it was as if we had flipped a switch - suddenly he started doing much better and doing a great job of coming up with clear reasons to eliminate or choose answer choices.
That was the most extreme result I've seen of someone ceasing to attempt to prethink answers, but in any case, he's not the first, and he won't be the last to get much better results by ditching that approach and focusing on analyzing answer choices to determine how they relate to the scenario presented by the passage.
GMAT Critical Reasoning - Trap Choices Versus Correct Answers