And it also won't enable you to transact from anyone Bitcoin address to any Bitcoin address (your original observation in our private discussion many moons ago). It has a simultaneity requirement.
I haven't studied this carefully but I've been told (maybe incorrectly) that with duplex channels this is (or will be with some script improvements) possible. Party A can open a channel to party B and then party B can either close the channel and accept the payment as simple Bitcoin, or just reuse the channel to send those coins back out.
Obviously in the former case, it isn't an instant microtransaction in a decentralized, 100.000 Txns/sec system, because it requires the Bitcoin block chain to handle that volume.
The entire point is that LN is a microtransaction system for a corporate behemoth controlled internet, not for an internet where there are millions of artists receiving payments in a decentralized chaotic pattern.
, if the usage in terms of number-of-channels is small enough and the rest of Bitcoin isn't scaled up too much where it too becomes corporate controlled. It does mean that millions or billions of active users without massive centralization is an unsolved problem. I specified "some B2B type applications" above (i.e. relatively small number of