[Habibi Jones]

can you explain why it should not be fizzled if you teleport on player rather than a tile? it makes no sense to have one but not the other..?

Well, there is reasoning to everything I post. The reason it should not be fizzlable if you target a player is so that teleport doesn't become useless (for example if you are in a crosswall).
Say you are in a cross wall. If you target the ground with teleport, you can be fizzled by players. If you target one of the guys attacking you, he has to run out of LOS so that you fizzle the teleport.
That's why it should be that way, so that you can still use teleport to escape. If you have a guy trapped and you see him teleporting on you, it forces you to run out of LOS so that his tele fizzles. If he casts it on the ground then you can just fizzle him.
This is a heavily tested mechanism, it works great