The internet has greatly accelerated my learning about reloading. I've only been doing it for about 19 months. One thing's for sure: I'll never know enough that I can't learn more about it.
I believe I am far along in that learning process, and I credit the internet for that. However, I also believe there is a way to use the internet effectively for learning, and many newbies (as evidenced by some of the horror stories of arrogant, self-confident rookies) don't have a clue how to do that.
I'm a scientist by training; everything I read I take as a hypothesis to be either supported or refuted by further information. If someone posts a load, I check it against other sources (including those in print) to confirm that it's reasonable before I start working up my own loads. If someone posts a fix, I'll try to confirm it against other sources and/or experimentally evaluate it myself.
It amazes me (though perhaps it shouldn't) that some people don't operate the same way. Especially newbies, for whom mistakes are sometimes not clearly mistakes (until kaboom).
[Post interlude: I learned as is generally suggested: ABCs of reloading, read reloading manuals, and so on. Some of the willingness to read books is, I think, generational; older people who didn't grow up on the internet do that as a matter of course. Younger reloaders, not so much (yes, there are exceptions).}
So the internet is taken by some as gospel, but as others pointed out in this thread, it's the internet, and nothing prevents anyone from posting anything they like, right or wrong. (An example: Pi = 3.41)
The internet *has* accelerated my learning greatly; youtube videos can be excellent at times. And the ability for us to have knowledgeable others post potential answers to problems and questions we post online is priceless.
But it is just the internet, not the infallible-net.
Since I began my learning w/o anyone to show me how, I was doubly blessed--not only by the ability of the internet to show me things I otherwise wouldn't have been able to see, but also in providing a source of help.
But in the end, I believe many newbie reloaders miss the fundamental goal in their haste: It's not about what they can do today or tomorrow that matters; it's what they'll know--and can do--six months from now that matters.
And if they focus on a longer time horizon, they'll double- and triple-check everything; when something doesn't feel right they'll find out why and won't proceed until they do; and their focus will be just as much on the process as it is the outcome.