LN is under used and doesn't seem to get a chance to mature because people are still expecting reasonable fees on-chain. (And yes, this includes me too, I know).
Personally, I'm satisfied with low fee altcoins, like Monero, so I don't find a reason to use it. Lightning is useful if you want transactions to be settled
immediately, but that's almost never the case for me. I'm fine with 2 minutes block interval.
I see what you did there. Although I expect the total number of Bitcoin transactions excluding the ones spamming data to be less than the total Litecoin transactions.
Approximately 20% of the total Bitcoin transactions were 100% of the Litecoin total. For this to hold true, more than 680,000 Bitcoin transactions have to be "spam" according to you.
But more importantly: I don't want to have to move to altcoins, and I'm guessing I'm not the only one. I do have some small amounts for small transactions, but I'd prefer to use Bitcoin for that.
If to accomplish it, you'd have to turn Bitcoin to an altcoin, would it be worth it? Because, that's what you'd do by tinkering with the block size. This risk has already been taken. This solution has already been implemented and tested by many altcoins. This community even had a cultural war a few years ago, and split. Wouldn't it be more appropriate to use other networks that align closely to your preference?