Feeding a snake in its enclosure does not cause tank aggression; that myth was debunked years ago. You are more likely to get bit while moving a snake for feeding than not.
Keepers with small snakes or very few snakes feed in a separate enclosure because they heard or read from someone with no clue that feeding the snake in its enclosure makes it think your hand is food.
Keepers with many snakes feed in the enclosure for convenience.
Keepers with giant constrictor snakes feed in the enclosure so they don't end up in the emergency room.
Keepers with venomous snakes feed in the enclosure so they don't end up in the morgue.
For best effect, turn up the volume when watching this:
https://www.facebook.com/diem.celest...7800391716217/