The corollary here is there’s 2 cases here:

1. You know exactly what the code should look like ahead of time. Agents are handy here, but this is rare and takes no time at all as is

2. You don’t know exactly what it should be. Building the mental model by hand is faster than working backwards from finished work. Agents help with speeding up your knowledge here, but having them build the model is not good

Code review is and always was the bottle neck. You are doing code review when you write code.