Services like Muun Wallet or Wallet of Satoshi often handle the opening, closing, and routing of Lightning channels for users. This means users rely on the provider to maintain channel liquidity, route payments correctly, and ensure funds are accessible.
And some Lightning wallets, like Wallet of Satoshi, are custodial, meaning they hold the private keys or control the funds in the Lightning channels. Users trust the provider not to steal funds or lose them due to incompetence or hacks. In other words, TRUSTED THIRD PARTIES.
There is not enough blockspace for 8 billion people opening private channels.