Raspberry Pi is Bitcoin agnostic & the ones used have no BT/WiFi capabilities (or theyre nudered),

seems more risky to trust a pre packaged device that is tied directly to Bitcoin.

The real issue with all these devices is verification of the code, they're all software companies.

So you'd want it to be free and open source so that everyone has an incentive to inspect & raid your code.

This has already happened with the SeedSigner project as multiple outfits have raided the code for their benefit: Blockstream & Foundation.

Further, their main detractor, Cuckkite, has yet to find any vulnerabilities in their code - and trust me NVK would get a nice hard boner if he did.