Sure. And everyone is welcome to go out and perform an intensive literature review of the existing science, make observations, come up with a theory that better

Sure. And everyone is welcome to go out and perform an intensive literature review of the existing science, make observations, come up with a theory that better fits the data, construct a specific hypothesis, run well-designed experiments, use statistically valid techniques to analyze the results of said experiments, and then publish their findings to be peer reviewed. That is (approximately) how you "question science." What you don't get to do, and then claim that you're not being allowed to "question science", is "research" by watching random Youtube conspiracy theory videos, ignore the entire existing body of knowledge in a field, use dubious (or no) statistical analyses, and run around screaming on Facebook and Twitter how your "findings" about the dangers of vaccines, or the veracity of the moon landings reports, etc. are being "suppressed" or whatever bullshit you can think of.