Internet where you send a packet over the wire and the network takes it and delivers it per RFC. Basically OG Internet. Network of networks of more or less trusted peers.
Or Internet where you need to requisition every connection/circuit be provisined before it is routed, which includes explaining why you need the service, and where any provider in the chain will deny you transit by default? You now must forge an intimate relationship with every middle box between you and the other endpoint. This process must be repeated by everyone on the network. Just operating as a middle box for someone else is now fraught with legal liability; as anything one of your transit's end up doing, you are now considered complicit in.
Both of these architectures of an Internet are equally valid and functional. The society that uses them however is completely different.
I prefer the former, warts and all, and lack of throat to throttle short of the asshat running the software on the other end, over the latter, because with the former at least, we're not creating power nexii to attract asshats to NetOps positions.
With the latter setup, sure, your spam problem has an ostensibly way higher barrier to entry in the form of having to create human trust networks, but the accretion of social power distinctly changes the culture of the net sector, attracting a type of personality that should never, ever be trusted to be given a yay/nay authority over other folks access to a network.