Yeah...this is aways good for a chuckle and the usual BF mantra. Don't want to change it because it looks better.
Slamming the stem to replicate a pro race condition closes the hip angle and for many if not most will reduce power output.
In fact for all riders, riding position is a balance between power output and aerodynamics.
Purpose to slam a stem is for improved aerodynamics. Slamming a stem on a Crux is questionable anyway unless you ride the bike solo around at 22 mph...which you may if a decent rider...but most won't...maybe sustained in a pace line when you don't even need a slammed stem unless pulling and you don't even need it then. The tradeoff is power. Some will want less saddle setback to compensate for closing the hip which affect generally riding comfort and most will ride on the rivet to open up the hip angle to create power in the drops. Many average cyclists lose power just riding in the drops with a recreational un-slammed stem.