For me it is only one way of doing things, it is nowhere said "preferred".
Think about this!
When there is a company and it does a hell of a lot job to comply with this 62304, what does it mean for the company? The benefit I think is only for the company itself rather than from the regulatory prospective. Regulators, notified bodies do not investigate the compliance with 62304, the scrutiny is only based on the legislation itself and based on in case the company for EU legislation voluntarily claim compliance with ISO13485, than it based on ISO13485. That's all.
Sometimes I feel a kind of endless crusader duty to spread these, I have no idea where the blind devotion to all standards are coming from (however I do benefit of reading those of course, but not blindly) ...
Cheers!