I commented that I'm very aware when unplugging 240v cords, but it obviously had nothing to do with the voltage but rather the style and given downsides of the 6-50p.
It would be easy to wrap my fingers further under the plug to get a better grip while removing it, but my brain says danger.....if you won't stick your most sensitive tool there, don't stick your fingers there.
I can completely understand how a person could do that. Hopefully, they learn quickly.
The other thing to watch for with cheap wire is aluminum conductors that may be copper plated. I'm not sure how common it is with 300v or 600v wire, but I have seen plenty for low voltage dc use. The cheap Amazon premade cords might be aluminum rather than copper, and that may or may not be ok with some people.