There wouldn't be a file loaded to print in my printer unless I'd put it there ready. it wouldn't fail deadly like you're saying.
I have a smoke alarm right above my 3d printer. I want to set prints going but don't want to wake my gf by having them run through the night, being able to start a print just as shes left for work means that I can wake up to a print that's already running.
Lets talk about this worse case scenario that a fire could start, It would also start if I was there to turn the printer on myself. I start a print and walk away from it. the only difference is I'd be sat at my pc vs in my bed. both times it would be down to a firealarm getting my attention as I'm not watching my printer 100% of the time.
How many times have you started a print and had a problem then vs later into the print?
You're saying don't delay start because it could fail, printings do fail from time to time but I keep printing.
What I'm trying to do is delay a print that Ive setup.
I could just keep my printer on with a gcode saying delay, BUT I'd like to be safe and not waste electricity by having my phone trigger the plug which then starts the print.
also say I wake up early I can just press the switch on my button and my printer starts.