There is no reason nocoiners can write their own NIPs for intergation with VISA, PayPal, etc. Dropping it because a bunch of bitcoiners are working on the same protocol is ignorant at best for a person that cares about "freedom tech".
That said, onboarding is one of the first things a new user is experiencing in any social media and therefore it's very important to both make it easy and informal. I'm not sure how many clients have a proper onboarding guide/tutorial yet but I know Damus has one and (maybe) Coracle? Either way, "nostr" won't have, and should not have IMO, a similar onboarding on all clients. We should embrace that some clients will be bitcoin focused, some will probably be shitcoin focused, and some will probably have an entirely different concept. Let's just ensure that the user knows it's way around the app they are using.
And as a final note, most devs working on nostr today are either working for free(as a hobby) or on donations/zaps. It's insane what most devs have built on nostr thus far. Don't expect everything to be built in a few weeks, or even months. Don't expect nostr-based clients to be "perfect" because a lot of people are still experimenting with nostr and the possibilities this protocol offers.