I use one Trezor T and one Ledger Nano each with the same btc account. Two wallets, different companies reduces risk.
Discussion
If you store the same private key on both a Trezor and a Ledger, you expose it to vulnerabilities on both stacks. So Ledger using a closed source "Secure Element" might have given you an insecure private key as there is no way for a public audit to rule this out. Copying a weak key to a Trezor now exposes it to Trezor's extractability.
You did not reduce your risk. You squared it.
They are not the only options on the market, right.
True, but to be fair they probably mean risk of "catastrophic loss of access" or something ... To me if you're not spending your stack, it's better to keep it offline & in totally cold storage - multisigs in stamped steel in various vaults or something. It's also good to keep a small amount in a poem in your head.