So, Vegas knows how to inflict pain bc of his father but he also knows how to care for wounds bc of him. Since he probably had to dress his own whenever his father was finished beating him.
“right now, i feel useless. no, i've always been useless. i never exist. i have no feelings. i don't freaking have anything left within me. i can't take myself anymore, vegas.”
not to use our beloved dead hedgehog as a poetic device but it's almost like he knew vegas has someone to look after him now, therefore he can finally leave vegas. like there's someone who got vegas now, who is gonna love him. he must have known that vegas is gonna be just fine