No. Emphatically NO. He did not "KNOW" it was BS. He had a hypothesis that a commonly performed prophylactic treatment might have previously undocumented consequences, and wanted to verify that the treatment was safe as well as effective. That is good science.
What is at fault, is people taking that question, twisting it from a question like "Are there unforseen consequences like XYZ?", and into "PhD says Unforseen consequences like XYZ happen! OMG!"
Want an example in real life?
Fluoridated water.
Are there consequences to public health that are serious enough to negate the health benefits of improved dental enamel strength? Are municipal supplies being given inappropriate levels of fluoride ion, given other kinds of fluoride exposure?
The answer to both,
can very well be a resounding YES.Fluorosis is a condition caused by high levels of systemic fluoride ion exposure,
which actually makes tooth enamel WEAKER-- in addition to causing a powerful
predisposition to serious bone deformities and cancers. You most certainly CAN be exposed to too much fluoride as a child/poor person. In addition to that, people who are not disadvantaged will be exposed to other sources of fluoride, such as via mouth washes, tooth pastes, and some brands of flossing aids. Combined with systemic fluoridation, this can cause these people to be over-fluoridated, and develop signs of fluorosis.
But dont you
*know*!? Questioning the efficacy of fluoride in preventing cavities, and in improving public health is bunk science from crackpots! /s
Nevermind that questioning what we "know", to make sure it is definately true, especially as tools and methods improve, is how we keep quality objective science, and that bowing to authority is how you end up with not-science. That PhD totally KNEW that questioning the health impact of vaccination was bullshit! /s
So NO. NO, HELL NO, you are wrong, and should feel about about saying it.