Please study the technology before making such claims. SegWit quadruples capacity, and lowers fees-- in fact the lower fees is one of the objections that resulted in BCH. The only reason there is any congestion on BTC is that the creators of BCH -- the "big blockers" have been spamming the network-- to drive up fees. If you have a significant portion of the mining hash power you can spam BTC with transactions to drive up fees and make a profit.

It's not core that wants high fees-- why would they?

Most people don't know of BCH and since it was done in such a half assed manner most wallets don't really support it yet.