Keeping a good posture is not always appreciated by young people, and I say this because I am young and I know it.
Yet, we always heard older people talking about health issues that could easily be avoided if they had good habits when they were young. Good habits like eating healthy food, and working out.
What you are saying about the pose is something I should start to apply, not because my back is hurting or anything, but because I know my back posture is not the best. I even try to remain consciously with a straight back, but always end up adopting a bad posture.
Its really try to maintain good postures 24/7, but it is not until we have a problem that we start to actively take action.
Having said this, I hope to never have back problems in my life!
Cheers!