TBH I would be more concerned if a majority if LN nodes were using residential IP addresses. Then, the LN gossip network would basically become a hit list for wrench attacks. Better to use an IP from a large company or the veil of Tor for home nodes. BTW, the majority of nodes are Tor only.

"Sufficient decentralization" does not mean that everyone and all capital IS PERFECTLY and UNIFORMLY distributed. It just means you have the option to be less connected if you want. Economies of scale are real and people are free to take advantage of them. The network remains decentral as long as there is choice and switching costs aren't prohibitive.

Similar to mining pools, its almost trivial to migrate an LN node to another host, or use another VPN provider for the node's IP if the one you're using starts to misbehave.