This is not really true unless there's something _really_ wrong with your back. For run of the mill disk hernia the patient satisfaction scores at 1 year for surgery and conservative treatment are pretty much the same [0][1].
I've dealt with lower back issues for a long time. The worst of it was long behind me and I've been diligent enough to not have crippling events. My lower back hasn't felt as good and pain free as of today.I don't know if it was all the walking I've been doing (vacation) and the bag on my back (weird right). The biggest change was the level of stress after vacation. I haven't been on one for over 7 years.
I feel much more relaxed these days but I can also tell that everyday this "stress bucket" is slowly getting filled by daily life and I have to dump it all out by doing something other than the ordinary. I'm not a super healthy eater but I'm conscientious about it. I'm not a gym goer or even home exerciser. Once in a while, I'd use my weights and do somebody weight exercises.I don't eat fruits and vegetables as much as one should. I also know that there is great variability in humans.
I'm also much more aware of my body and what it needs as far as physical therapy exercises. I've a lot of time watching videos on physical therapy and back pain. I spend the most of my time at home walking on a treadmill while watching something on the TV.
[0] - https://bmjopen.bmj.com/content/6/12/e012938.short
[1] - https://link.springer.com/article/10.1007/s00586-010-1603-7