If everyone would practice social distancing, there would be no need for a lockdown anymore, nor in the future. People letting their guard down with regards to SD will lead us right back into the lockdown (whenever this one is finally lifted).
It's unfortunate that somehow they're conflated.
ETA: To be clear on definitions, social distancing is staying 6+ ft away from people you don't live with, wearing masks etc.; lockdown is the shuttering of risky places where people congregate, by the government.