Egress is a life safety requirement enforced by your building department, not a design detail. What the requirement is for, when it is triggered, what gets verified, and the drainage consequence nobody plans for.
Interior vs Exterior Basement Waterproofing: What Each Really Does
Exterior work keeps water away from the wall. Interior work manages water that already arrived. What each actually involves, what neither does, and how to make two dissimilar proposals comparable.