> Bitcoin main, on the other hand, is moving toward SegWit, which introduces third-party middlemen.
SegWit does not introduce third party middlemen. SegWit is just a different way to calculate the transaction hash that needs to be signed, such that it doesn’t include the signature script. This was arguably the way it should have been all along, since the signature script itself isn’t signed (it contains the signature). This means bypassers can modify it without invalidating the modified transaction (if they don’t touch the actual signature data but only add e.g. a NO_OP opcode).
SegWit does not introduce third party middlemen. SegWit is just a different way to calculate the transaction hash that needs to be signed, such that it doesn’t include the signature script. This was arguably the way it should have been all along, since the signature script itself isn’t signed (it contains the signature). This means bypassers can modify it without invalidating the modified transaction (if they don’t touch the actual signature data but only add e.g. a NO_OP opcode).