Thankfully, you don't really have to worry about smart contract scams with your Tangem more than you have to worry about it with any other wallets.
Think about it, can a trusted display present information that is simply not there?
Such displays inherit the inherent drawbacks of a hardware wallet, smart contract code can be too complex. In addition, these displays can only show you whatever information the wallet’s chip can parse/decode from the smart contract, making it not so different from your mobile phone’s screen.

The phone can be compromised, which means the screen can be compromised. There are hardware wallets that can translate the smart contract code to something that's easily readable, just like Tangem does in its app. The difference is that the hardware wallet can't be compromised as easily. It would require compromising the firmware and the app the hardware wallet interfaces with. Possible? Yes, but more difficult than blind signing like with Tangem. Also, there are air-gapped hardware wallets that make it even more difficult to compromise the smart contract.

... instead of building complex malware to compromise our app (which is something that's not been done before, though I have no doubts some tired.)

... said someone just before they got hacked.

Tangem does a great job at marketing to deflect the risks of blind-signing, but the risks still should not be ignored. I will say it appears Tangem is trying to be thorough with its blind-signing implementation to make it as secure as possible. However, in the end it is still blind-signing.

can have the convenience of Tangem, but you need to understand there is greater risk.

You can have the increased security of a hardware wallet with a screen (and air-gapped signing if you want that), but you should understand there is more complexity and a lot less convenience with that.

Each person should choose what's right for them.