I'll agree with all this, but will point out that a good implant given to a calve when castrated/ banded will more than offset any performance loss..I have seen first hand that bull calves left in tact until 500-700 lbs out perform bulls cut or banded at birth. Better performance while nursing momma, Increased weight at weaning, increased weight at yearling. Bottom line bulls develop better than steers. When a calve is born, all I need it to worry about is keeping up with momma and nursing.
I tested this with bull calves born on the same day, banded one at birth like I used to.
Left the other in tact, like ALL my other bulls, until 9 months old. Not surprisingly when I sold them all as yearlings one was noticeably more long-legged, thin, hip-boned, shallow butt, high tail head. You guessed it the one banded at birth.
I only band at weaning, and only use a calicrate bander. Assuming you have proper equipment It is also safer.