The “public psychology” regarding the decision to pause the J&J vaccine should probably be taken into consideration, but not over-thought. There was/is a (rare) reaction that has warranted a closer look, some time for asking questions and looking for reasons and connections. Leave it at that and stop criticizing the decision to pause. Just stop. Find something else to do.
Yes, this will only bolster the veracity of the anti-vaxxers who will have reason to boast and say “I told you so.” So be it. Let them preen, but ultimately let them continue to stew in their own naivete and ignorance. Their fifteen minutes will pass, and those who get vaccinated will be doing something far more constructive and helpful.