No, maybe you're not afraid to admit to yourself that you suck at aiming. Maybe you don't know if a turd is going to make an appearance. Maybe it's just been a long day and you want to sit down.
No, and you won't have to worry about getting pee on the toilet, or the seat. :-)
NOPE...SOMETIMES PEE STILL BE IN THE PIPE LOL
Who's going to know? Do whatever works for you