Can anyone tell me why the category requires no deaths? Wouldn't Any% suffice?

Thanks.

Can anyone explain the new setup for the wrong warp in 5-2?

Thanks.

Does anyone have a video of an explanation of the warp in 5-2? I can see that it is similar to the set up needed for 4-2 in SMB Any% but I am unsure as to how many "bumps" are needed and what are the inputs needed for Mario to warp into the pipe.

I would be grateful for any help. Thanks!