Oh wow this flow would be really cool! Both observations are linked in a way: the WordPress ecosystem is really impressive and we'd love to create something similar in the Jamstack universe. To do that we are planning to open a "marketplace" where users could find components, themes & plugins. So, if we enable one-click integrations of components in a user's library, I think you are right that it'd be better not to have to link a Github account as most non-developers won't have one.

We will start working on the marketplace sometimes in Spring. We'll probably have our power users contributing first and then gradually open the marketplace to all the developers willing to build for the community.