.....some don't know the difference between coinbase wallet and trust wallet, one gives key and one don't
TW is non-custodial alright but it's not the best example to compare with Coinbase. While one is custodial and the other is not, both are closed source. That means it's not that trustworthy too since there's no transparency and review or audit is close to a few developers unlike open source non-custodial wallets such as Electrum. Check this topic
https://bitcointalk.org/index.php?topic=5244810.msg54332332#msg54332332