Even then though the supplier can do something about it, i.e. not turn the power off on a whim. Smart meters have been about in commercial premises for many years and you don't see surgeries and offices etc being plunged into darkness on a regular basis. Yes the intention of the new wave of domestic smart meters is to do load shedding and control the grid but that doesn't mean they just disconnect you and leave you with no electricity!
The early resistance the smart meters made sense as they were unreliable and were tied to each supplier so couldn't be used if you switched tariffs or providers. I don't see what valid argument there is for not having one now?