there is an inconsistency I have noticed between kbin and lemmy in the format that such links are presented. The problem is in the exclamation mark. In lemmy it is required to show it is a community, however here it is not
For example if you write it as https://kbin.social/m/formula1@lemmy.ml you'll see it works. (Ok, the content is outdated because of the known problems but the you get the point)
while technically you're correct, what I see as different that I think needs improvement, is the discoverability. It is needed to somehow when I search for e.g. technology to also see the various federated "technology" communities. If I have to manually search for an instance, find the correct handle, then go search for this handle in my own instance and only after that to be able to subscribe, it adds a difficulty on the level that I may never manage to know about the existence of some other communities (magazines). Apart from that, I agree it is totally fine to just let them organically grow and it will sort itself out on which one I may want to participate more.