Why is alarming? Is normal.
Fees on LN will always be variable.
Don't make too much case for that.

And read my guides. I did a lot of testing in all these 10 years with Bitcoin and all these tests became guides. For example this one:
https://darthcoin.substack.com/p/private-lightning-nodes
https://darthcoin.substack.com/p/managing-lightning-node-liquidity