Who Should Use Specialization Phases?

Paul,

What are your thoughts on the utility of specialization phases to build up body parts? Who should bother with them?

I have seen other coaches say spec phases help to focus your body’s resources to build up just one or two parts at a time. This assumes one already has some level of development and is beyond the noob stage. And this seems to assume the body cannot efficiently grow everywhere at the same time at some point in the long term process.

Thank you.

Only advanced guys should really bother with it.

Noobs and even most intermediates have so much ceiling for improving rep strength they just need to focus on that.