In what way is using a debugger "slow"? I find that it speeds up iteration time because if my print statements aren't illustrative I have to add new ones and re

In what way is using a debugger "slow"? I find that it speeds up iteration time because if my print statements aren't illustrative I have to add new ones and restart, whereas if I'm already sitting in the debugger when my hypothesis is wrong, I can just keep looking elsewhere.