Could you provide example of sabotage?
Let's imagine a situation. The year is 2140. No one is using the first layer for transactions anymore. All transactions are conducted on something like Ark protocol. There are 100 Ark service providers collectively generating 100 transactions in each block. They set a fee of 1.20 satoshis per vByte in their transactions. Miners go out of business and stop producing blocks. Network difficulty drops dramatically, and Bitcoin ceases to be a reliable store of value.
I see. I initially though you're talking about sabotage which done by miner/pool. I've read a bit about Ark before, but at bare minimum i expect some people would still prefer using on-chain for following usage,
1. Send big amount of Bitcoin.
2. Storing arbitrary data.
3. Transaction which need or better shown publicly. For example, public figure make Bitcoin donation to charity where he provide on-chain TXID as additional proof.
Wouldn't it be better to take unused coins and use them to incentivize miners to continue their business?
Maybe, but as i said previously it's very unlikely majority Bitcoiner would agree to such idea.