After I had a few similar close calls - with only models damaged fortunately - I started leaving the throttle in a position where the motor will not arm
when the pack is connected.
That way if you bump the throttle xtick the most that will happen is it arms and gives you a warning.
I dont know about the off brand esc's but with Castle you can leave the throttle stick at mid position or full throttle and its safe to plug in the packs. The esc will not arm until you go to low throttle.
Its a good habit to get into