The issue is the idea of scaling lightning to be a global payment network... from what I have read, which is not a tonne... it will effectively need to use custodial wallets, and we are back to banking 2.0.
I saw a meme (and I am sure you did too) that said "BTC is the CBDC"
If lightning ever does scale (with large custodial lightning wallets) to that size (which is doubtful) privacy is a thing of the past.
Lightning as it is now, is niche and pseudo private. If you have a use for it... great.
BTC would scale with larger blocks, but alas, we will never see that on the current BTC chain... the XMR people all seem confident (that is until they get the traffic, your point is very valid). BCH says it can scale well beyond VISA/MC with sub penny fees (believe it when I see it).
RE: Lightning Network Limitations