Then stop pretending it is. Every discussion about Musk would be much simpler, if every single attempt at it didn't have to start with a "no, Teslas are not going to fix the planet" chapter and those bizarre attempts to redefine every single term used in it in a way that is used only in this particular discussion and conveniently only highlights stuff positive for him.
Obviously replacing engine is a step in the right direction, but it's only one of the hundreds of steps that he is trying to make and engine is only a part of a part of an equation. You'd think that, for example, making cars bigger despite serving no practical purpose and advertising them to people that have no need for a massive car would be held against him in such discussion, but apparently it only matters if it's positive for Musk.