If you want to learn pretty much anything the information is there, but it's not curated, and you don't have the support of a guide. Especially if you're new to the field, you don't necessarily know how to even ask the right questions about where to start or how to get unstuck.

To make an analogy, if you were learning to exercise for the first time, the information is out there, but there's a ton of bad and conflicting information out there too, and if you're not careful you'll make no progress or even get hurt. So it makes sense to hire a trainer or learn from friends, especially in the beginning.