Allowing men to set a BMI or weight preference would be business-wise far more sound decision. Their userbase is anyway men dominated and they are pretty much the entire revenue source.
All these numbers and metrics won’t help anyone, it’s superficial. Just like picking a guy if they drive a truck or are bald, that doesn’t mean they are a better person.
Are they also looking to set preferences for chest, cup, waist, inseam, shoe, sleeve, and hat sizes?