You won't have any "nightvision" driving at night unless you drive somewhere with no streetlighting and don't meet any cars with headlights on AND turn off all your own lights including the dashboard! And if you were driving somewhere with no streetlighting or traffic lights, you're probably not going to be stuck behind someone stationary with their brake light on.
If driving an automatic car with an auto start/stop feature, where the engine cuts out when stationary, you have to keep your foot on the brake or it doesn't work. In mine, if you put the handbrake on and take your foot off the brake, the engine starts. In order not to sit at traffic lights with the foot brake on, I'd have to put it in Park, apply handbrake, then take foot off brake. When setting off I'd have to put foot on brake, put it in Drive and remove handbrake. And the engine would be on all the while, increasing emissions and fuel use. Bit of a faff compared to just sitting with the foot brake on, engine switches off. Then lights go green, remove foot from brake, engine starts, off you go.
If I wanted the engine off while at the lights without having foot on brake all the time I'd have to do the above and then also turn off the engine.