I got caught by Tangem’s marketing, lol, and their seedless solution
I think "seedless" is reckless.
A seed is your backup. Let's say your hardware wallet gets destroyed somehow. No worries. Buy a new one and enter your seed phrase to restore your wallet on the new device.
Many years ago, I had a hard drive failure. It took me a long time to rescue my data. Ever since then, I've had a backup hard drive that powers on in the middle of the night to back everything up. And I have a Time Machine backup too. It's just smart to have backups.
Your seed phrase is your Bitcoin wallet backup.
Remember: Your coins aren't in your wallet. They're on the blockchain. Your wallet is the collection of your addresses and keys (and other seed-generated data). That's why a seed phrase is so important. If anything goes wrong, no worries. You can get it all back by using your seed phrase (and passphrase, if you use one). That's why your seed phrase is so versatile. If anything goes wrong, you don't even need to buy the same kind of wallet. Any wallet that uses seed phrases will generate your exact same wallet. It's such a brilliant system.
I see Tangem promoting seedless wallets, and I think they're insane. That's like saying "Get where you're going faster in our brakeless cars! Genius, right?" YIKES! OK, maybe it's not quite that bad, but still... I'd never use a wallet that isn't 100% open source and uses seed phrases.
If you're going to do self custody, your backups are the most important thing you'll have.
I know, I know... Tangem does their own card-backup scheme. There have already been cases where people lost their cards. A seed phrase is a much better form of backup.