The oil that lubricates the combustion chambers and pistons gets burnt and filled with nasty combustion goop. An impressive amount of cleverness goes to minimizing this, but the oil that sees the combustion chambers still goes bad at many times the rate of any other lubricant.

Even on an ICE vehicle, you have transmission oil and differential oil and lubricants in your air conditioning compressor and brake hydraulics and grease smeared on CV joints and door mechanisms and pretty much everything else that moves. But you still talk about "changing THE oil" and mean the oil-that-sees-combustion specifically (along with, typically, the filter that fights the constant battle of getting the worst combustion products out of it). I personally think that makes it fair to say "EVs don't require oil changes" because even though they don't magically eliminate the other lubrication systems or the need to maintain them, they do eliminate the one that is so much more obnoxious than the rest that we commonly called it "THE oil change" before this was ever a debate.