There can be a lot of truth in this statement. For example, it's possible that your back pain is throwing off your gait (the way you walk), and that pain has worked all the way to the neck. Or maybe it's causing you to be in a more flexed posture; now you extend your head back so that you neck is straight.
Remember that your whole spine is connected and if one part is shifted out of alignment then something else will shift to compensate.
Also, if you body is diverting all of your attention to the low back, for healing, it may leave your neck susceptible. Same goes for you compensating for one part of the body.
Lastly, your neck may start hurting, but you don't even notice because your low back hurts so much!
Additional Reading Resources
Remember that your whole spine is connected and if one part is shifted out of alignment then something else will shift to compensate.
Also, if you body is diverting all of your attention to the low back, for healing, it may leave your neck susceptible. Same goes for you compensating for one part of the body.
Lastly, your neck may start hurting, but you don't even notice because your low back hurts so much!
Additional Reading Resources