Removing biamp options is a doofus move by the likes of Wilson, Magico, etc. (My guess is that went on a route where their crossover designs are suboptimal for biamping). I don’t care for their speakers eitherway. Other high-end manufacturers (TAD, Schwiekert, etc) who have stuff that sounds even better do permit biamping. No problem there!
As a practical matter, biamping is a way to put some high fidelity lower powered class A amps on the mid driver, tweeter, etc and some class AB or class H that runs cooler for the bass drivers. Running gigantic space heaters/amps in the room will inevitably make the HVAC system kick on a whole lot more ---> Higher noise floor from the airconditioner running ---> You just lost your high fidelity when the air conditioner/HVAC kicked on Sherlock.