Needs and possibilities are different topics.
Nstart doesn't require any specific ability, beside reading. Who can't use it?
And what could be a different "need"? Don't invest 90 seconds to create a lifetime account?
Of course we can think about other approaches. I valuated some of them in a quite long process and this one seems to me the best one, with some tradeoffs of course.
If there will be evident problems, supported by data, I will be more than happy to fix them or review the full flow.
Anyway, the beauty of Nostr is that we don't have to choose a single solution, we can have multiple onboarding platforms that work better for specific segments.