No. Alex Bosworth, Head of Lightning at Lightning Labs, famously runs a node with about $1M worth of liquidity.

He spends 8 hours a day managing it and it earns him around $30K per anum.

It's his job, so the $30K income is unimportant, but a 3% return from an investment and a full time job as one of the most expert proponents doesn't make it worthwhile for normies.

Companies are actually making money by selling inbound liquidity, but you need a lot of capital to do this.

The likes of ACINQ, WoS or LqWD are large corporates and possibly make money from it.