People can build whatever they want. Bitcoin doesn't care.
If people want to use this BTC -> xBTC -> Cardano -> xBTC -> BTC thing, they should have the freedom to do so.
I don't, but hey, you do you. All that complexity doesn't stop me from zapping sats around.
Also, here's a link to the article without trackers: https://news.bitcoin.com/bitcoinos-completes-first-bridgeless-cross-chain-btc-transfer-between-bitcoin-and-cardano/