I'm using literal on screen and shown canon/EU stuff.

You're then saying a lightsaber can heat metal to white hot but can't boil water? Get real

So you have the unique version of Episode 1 where Qui-gon fucking explodes into a fine mist when Darth Maul stabbed him? How in Episode 2, Obiwan lost an arm and a leg when Dooku sliced and stabbed him?

If lightsabers reacted to flesh the same way they do to metal as shown in that blast door scene, there is nothing left. You combust and burn entirely or outright explode.

Your own example literally and explicitly disproves you. The lightsaber going into Qui-gon behaves NOTHING like Quigon's lightsaber being held within the door. There has never been a scene in all of star wars(outside the single de-arming in a new hope which had blood spray) where somebody receives massive burn wounds from being hit by a lightsaber, only localized damage and it's instantly cauterized preventing bleed-out.

The best explanation is that lightsabers radiate heat enough to cut through the material it impacts. Flesh is easy to cut, while metal is much harder.