The middle man is a layer that no one wants and it is not in the room with us now because no one wants it.
15k "Entities" means a bunch of VMs spun on the same servers.
And when they get moderately popular, the size of their block history becomes prohibitively expensive to download and verify.
This is where the technical rubber meets the road with all the lightning sycophants. This is insanely untrue and it never has been. No one is ever able to prove this with numbers, they get out the playbook of dealing with a claim they can't back up.
Bitcoin right now has the bandwidth of a 28.8 modem. At one point single transactions cost more than the space to store the entire chain. Normal people don't even need to sync with the main chain if they don't want to. The actual numbers of bandwidth and storage of this argument are so far removed from reality I can't believe people still say stuff like this. It's pure propaganda.