That is your opinion only, and with that logic you can say that everything in the world is crap, more or less, but that is simply not true.
I would never use tangem,ledger and similar closed source devices that are mostly just a security theater, and they are only damaging the whole bitcoin ecosystem.
I just think we put our trust in things that cater to our biases, like 'open source, transparent, tested...' But as soon as they show a vulnerability, we're disgusted and shocked. My take is that everything in tech is vulnerable, from proprietary to open-source code