I would like to use BRC-20 for completely uncensored communication.
Then why don't you run your own Nostr or Matrix server?
That is alongside the second layer scaling solution and as a complementary improvement because something like LN can not solve much alone.
Well, if the problem is that on-chain peg-in transactions are not sufficient to bring all people inside LN, then there are other solutions. One of them is to put channel-opening transactions to the off-chain world:
https://delvingbitcoin.org/t/can-game-theory-secure-scaling/797/1 And another is of course CoinPool, or other similar proposals, to switch from 2-of-2 multisig into N-of-N multisig:
https://coinpool.dev/Opening LN channel from sidechain sounds interesting. But on other hand, it'll require some party use LN software which monitor activity on that sidechain. And in practice, both party could just create the transaction on sidechain itself since sidechain usually offer lower TX fee.
Assuming you have an LN-compatible sidechain, one potential benefit of opening an LN channel from the sidechain is that it can offer lower transaction fees compared to the mainchain. This can be advantageous if you frequently engage in micro-transactions or require faster confirmation times.
The decision between using LN channels from a sidechain or performing transactions directly on the sidechain will depend on your specific use case, the cost considerations, and your willingness to run and maintain LN software compatible with the sidechain.