Since when is modeling not a design phase…?!?!?!
I was in architecture for 42+ years, modeling was definitely a design phase, and we got paid accordingly, as per our firms contracts.
Whether it was hand-built models back in the day, or, more recently, SketchUp, Lumion, Revit modeling, etc.
clients could opt out, but the vast majority were willing to pay nicely to be flown around and through their homes, office buildings, etc. before ground was even broken.
Also, and even more importantly, it gave us designers the opportunity to identify problems with all aspects of the design, including positioning of the structure on the site regarding things like topography, drainage, etc., as well as lines of site, scale, proportion, etc.
Again, from my 42+ years of experience in architecture, your claim that modeling isn’t a phase of design is just, patently, false.
Plus, the renderings from those models gave clients nice framed representations to put on their game room, man cave, etc., walls…!!!