In some software platforms, the tooling makes it really easy to use a debugger to see what’s happening, so it’s common for everyone on the team to use them all the time.

The comment you’re responding to mentioned pulling code into a function. As an example, if there’s a clever algorithm or technique that optimizes a particular calculation, it’s fine to write code more for the machine to be fast than the human to read as long as it’s tidy in a function that a dev using a debugger can just step over or out of.

More succinct than I managed.