Is that because you would never pay using lightning even via Monero proxy?

If so:
Based.

That being said, I do think this is a good idea and could prove useful. Maybe the Monero folks can use it and then send a friendly message saying:
I would have loved to pay privately using Monero natively, but I can't fix someone else's retardation. Luckily, I was able to pay using shadowstrike.