Master Cylinder Bench Bleeding: Isn't it redundant?

[Mike1261]

I'm replacing my brake master cylinder later this week after 6 months of not having my E53 while waiting to get some parts to complete the new lift in our garage :-D

Every resource seems to suggest I need to Bench Bleed the master cylinder.

If I'm flushing and bleeding the entire system at the calipers, isn't that just redundant work? Or is there some specific reason that makes it important to bleed the MC before bleeding the rest of the system?

Thanks!