Its not up to the mods to decide, its up to Horikoshi
There a quirks that can go against scientific laws, however its still based on a world like ours, and includes scientific principles. Only now, there are exceptions. Again, Momo's quirk is pretty much existant and proves my point, a smilar based quirk in Engine works the exact way a car engine would, which requires combustion from the fuel in Iida's energy sources.
The main point is, you cant say, when this is how quirks like Engine operate, that, unless otherwise stated, the only way a quirk is powered is through the users energy. People in MHA still require sustenance unless its based off a quirk, which from food, water whatever, gives them that energy. Therefore, High-Ends quirk and his shoulder jets as a part of his body, require that of a fuel source, and much like the mutant quirk it is, similar to engine, thats most definitely coming from the use of energy. If Horikoshi wanted us to note how the quirk works, he would have told us, but other than that we can make safe assumptions based off what we know about mutant quirks like Shoulder Mounted Jets. Meanwhile, your claim that they're air or water jets is much, much more baseless. Jets produce thermal energy as they burn. What are you assuming now? That the jets use a frictionless power source that creates no heat? Because thats impossible and would be stated
It is the only source. Airplanes dont rely on air or water, and ive already proved why it cant be those sorts of jets. It literally is the only one that makes sense
All energy transfers create heat. Jets require a lot of power, and therefore more burning of fuel is needed. Its a literal concept that revolves around heat. Please tell me why your idea of a heatless transfer is just as baseful as my idea to base it what the quirk is based off?
High-End has won anyway with the latest vote, and now we wait for a grace period.