There's a lot of similarities, that's for damn sure.
However, since dogs are way smarter than kids, they take less time to learn things
Permanently Deleted
Behemoth! The Shadow Elite
Rotting Christ, live - Sorrowful Farewell & Among Two Storms
Ghost Hounds, House a Home
Ensiferum, Victorious
Wednesday 13, When the Devil Commands
Septicflesh, The Experiment
Gangstagrass, Obligatory Braggadocio
Meshuggah, Ligature Marks
Arch Enemy, Paper Tiger
Revocation, Confines of Infinity
Saxon, 1066
Cradle of Filth, To Live Deliciously
Dream Theater, Midnight Messiah
Brat, Barracuda
Eluveitie, The Prodigal Ones
Alien Weaponry, Mau Moko
Septicflesh, Psychohistory
Myles Kennedy- Miss You When You're Gone
Robot Monster, Night Terrors
Will Smith, Joyner Lucas; Tantrum
There's a lot of necessity there. Our natural speaking voices use the throat and lungs in a different way than any singing techniques. And, there's multiple ways of using them to get a desired sound.
So there's some degree of style involved, but past a certain point you have to change your voice to sing rather than just speak in tune (which is still a valid thing of its own)