[CryptoPunk]

You need an on chain transaction to create a LN payment channel. And if you only create one payment channel, you are highly dependent on the one peer you connect to, and reveal your entire transaction graph to that peer and the nodes the peer is connected to.

To get decentralized permissionless-ness and privacy, you need many channels. And you need a lot BTC to put in all of these channels, as the LN depends on BTC (or ETH or whatever cryptocurrency you're transferring) equaling the maximum amount you may want to send in any one transaction being locked up in the channel.

With transaction fees exceeding $15, Bitcoin is already unusable for the majority of the world's population, even with the Lightning Network, and even if each user only creates one payment channel.