The idea behind putting handlers with nprofile and such might be that there are clients that don't render profile metadata(rarer case perhaps) or even kind1s like in my case.
 My app creates a feed of freelance tickets instead of a kind1 feed.
However, I could implement mechanics to jump to a different client to render kind1s under certain conditions or an iframe to render any event that references my freelance ticket/offer.

Not sure, just thinking out loud.