...despite all the warnings on here about how you just had to get a teacher or you'd wind up crippled for life from poor technique.
Nah, no one here ever argued that. Rather, we argue that the likelihood of injury is greater without proper technique. You may not be crippled for life, but you can hurt yourself. Even one or two lessons can set a new player on a safe path.
...Some of these guys on here, while well meaning, seem to think everyone is in training for the London Philharmonic. Some of us just want to pound out a few Bill Monroe and Hank Williams songs...and guess what? I seriously doubt their bass players had ever heard of the Simandl method.
Ah, the classic internet argument of "all or nothing" extremes. There's a great deal in between just plunking out a few notes and playing in the London Philharmonic. Most here aspire to somewhere in between. Many aspire to a level that requires all of the talent and skill required for the philharmonic, but in different genres. Those levels are reached via good teachers.
So I watched some vids and started playing and you know what? It ain't all that hard!
It depends what "it" is. If you want to play well, then it's not all that easy. Sure, if you set your sites very low, you can plunk out what's satisfactory to you at that low level. Not surprising at all.
If you have been playing EB and know the I/V and walking patterns in country music you will be rocking from almost the gitgo once you learn your way around the larger scale. It just ain't rocket science.
...and you'll likely sound like a converted EB player which most of us can spot visually and sonically from miles away. Again, if all you strive for is a rudimentary level, then fine.
...I been at it 6 months. I play almost every day and no injuries yet.
The operative word being, "yet." If you drive around without a seatbelt, you can probably go for a long time without injury as well, but when it happens...
Am I a great bass player?...Hell no. Am I even a good bass player?...Probably not by the standards of most on here. Am I good enough to play roots country?...Hell Yeah!![]()
Hey, if you're happy, then great! It's worth pointing out, however, that your aspirations are lower than that of most folks around here. There's nothing wrong with that but I think it limits greatly the generality and usefulness of the advice you offer.
By the way, I'm not a pro player. I have a day job and I'm a nighttime/weekend warrior. I'm not a great player. I'm likely not even a good player by the standards of many here. Still, I've spent years with teachers, both classical and jazz. Maybe I just have a low level of talent. Maybe you're a "natural genius" of a player. I do know that my experience with regard to formal training seems to square quite well with the experience of most here.

I'll make sure to update everyone as this progresses.