From a purely practical point of view........knighthood is not just conferred upon a person, but is directly related to some interest, skill, knowledge, good works that the person has undertaken or enhanced in some way.
Basically, if someone is knighted for services to.....say working towards the understanding and cure of a disease, then the fundraisers and special interest groups associated with that disease find themselves with a titled personality who is the public face / personality associated with them in the news, public relations, and the like.
A person of influence in other words.
Someone who's views might be consulted before committees assessing and evaluating new laws or access guidelines, for instance.
If the footballers and racing car folks can have a knight or two
, tell me why we can't ?
cheers,
Toddy
p.s. this all presupposes that RM would say yes, frankly there are other personalities I'd much rather not even be considered.