People get used to treating electronics and computers as black boxes, not concerned with their internal workings since things just tend to work how they should these days. But when you get into high power and batteries, you have to consider chemistry and heat. You can't just plug a 2000W inverter into a battery and assume things will work without any issues down the line.

It's the same reason fast-charge for phones only works with a specific type of cable and connector. Otherwise you could overload the battery or the burn the cable by sending too much current through the wrong cable.