I don’t think so, tips are for service and moving my bag of food from the shelf behind you to the counter in front of you isn’t service, that’s just your job. I tip waiters, bar tenders, and drivers (delivery, ride share, cab). That said I’d love to get to a point where we can largely get rid of tipping by forcing full wages for all jobs and not tipped wages.
The Enbrighten Zigbee switches I installed in some rooms work exactly as you note, if the zigbee network collapses for some reason, they still control the outlet or light they are hard wired to like any other dumb switch. I think for hardwired switches this is the normal behavior. For anything like Hue or Ikea Tradfri switches that are battery powered I think it highly depends on what they are connected to.