You say that, but watch how it is at gw2 where the developers there didn't even bother putting dungeons, or bosses that have increasingly complex mechanics in the game story, not only do people there only know how to press the autoattack button, they don't even try to dodge orange circle, it's even got fully iframed dodge rolls unlike 14 where you have to walk but they still won't bother.
You can absolutely educate the majority of your playerbase to reach a baseline of competence (it is higher in 14 than gw2, you figure that one out), shitters that fall through the cracks will always exist but there absolutely exists a game design issue in how to handle some things in 14, the biggest example being tanks and the zero indications of how enmity really works which is why you see people still using provoke to pull and then wondering why it doesn't work, or why square has to constantly change and nerf enmity to turn it into baby mode instead of having a fucking tutorial on it.
Sure, most of anything is solved if people bother reading fucking tooltips but that's precisely why I'm talking about tard proofing, current year niggers can't read more than 3 words in a row without steam coming out of their ears; regardless of it being to our liking or not modern gaming has gotten people used to intrusive obvious tutorials and flashing arrows that say "THIS IS HOW YOU DO IT RETARD", not having that in a mainstream big game is asking for trouble.