Checklists were life in the USAF working on heavy bombers and the nuclear PRP program. I’ve done a procedure 100 or a 1000 times? Still going down the checklis

Checklists were life in the USAF working on heavy bombers and the nuclear PRP program. I’ve done a procedure 100 or a 1000 times? Still going down the checklist in the Tech Manual every single time. Humans can’t multitask well and if you miss a step, people can die and planes could crash.