I think this option is most likely pointing towards the use of airgapped devices where you make one out of your devices and then install one of this wallet in it. Yes I can categorically say this is the best out of it and most trustworthy but that depends on who is building it. I personally prefer my own airgapped device as my wallet than a hardware wallet most especially if you’re from a region where it is hard to get the direct access to your preferred hardware wallet company but most at times I advice newbies to simply go for an hardware wallet.

My reason been that you need to be knowledgeable and careful setting this up and any tiny bit of mistake might leave a back door or even make the airgapped device not longer airgap again, and sincerely newbies can easily make this mistakes and exposes the wallet.