Good advice, computers are buggy as heck and, seriously, hw wallets definitely have bugs, too, and can also crash. Heck, Windows might just decide it's time to install some bug patch and reboot while you're trying to transfer keys.
Even just static shock could fry any electronics no matter how "tough".
I actually hate it that things like this are "good advice" now. Things like this should be common knowledge. Saving your passphrase on your computer or even your mobile device, especially saving them on Microsoft Word, Notepad, or similar un-encrypted programs are pretty much handing over your cryptocurrencies to hackers. I mean, it only takes a minute to write the seed on paper. How could people be so lazy? We're talking about money here. I couldn't count how much people I've seen on Facebook groups complaining that they got hacked and stuff.