I think all points are somewhat valid , but none of them are a deal breaker to me.

Certainly closed source software is the worst of those points, but not all their software is closed software.  I think o ly ledger live is closed source  but the firmware isn't . They do not have a malicious code in their software,  they are not stealing people's money and actually it is one of the most secure ways of store btc. I trust much more ledger live than some random one  source software  .

Being open means it is auditable,  not that it was audited

Memory is not a problem at all. Install and Uninstall those apps take literally 10 seconds and you wouldn't be doing that so frequently (if you are, you are doing something wrong)

About LED , plastic, etc, that is what you pay for. Ledger nano is extremely cheap.

What really think is important in a hardware wallet is the capability to generate private keys in a safe environment.  Once the keys are generated and I have properly backed them up I don't need ledger live support or a beautiful plastic anymore.

I can just use that seed in any software and recove may btc,  which I know are safe, even after 10 years. Ledger nano can do that nearly flawlessly,  and I am pretty satisfied because it fits my needs.

I know other people may have other needs.