> We have pushed to a whole generation of people that only the "experts" can have opinion on some fields. I encourage everyone to read papers and have opinions on some of those subjects.

There's nothing wrong with having an opinion on something as a non-expert, as long as those opinions are not acted upon or relied upon as a source of reliable information. Read papers, watch YouTube, browse WebMD, satisfy your curiosity--knock yourself out. But don't undergo treatment without working with an actual expert! I'm not an expert on orbital mechanics, but I have played KSP and have formed various opinions about it. But nobody should be listening to me for advice on how to launch a rocket.

We need gatekeeping for a reason, especially in the medical field which is rife with miracle cures, snake oil, herbal remedies, detoxes, homeopathy, and other forms of quackery.

Believing my "research" is better than my specialist's education is a path back to the dark ages.