Broken Switch game cards can permanently damage your Switch, warns repair shop

Here's a word of warning for you. Always check your Switch game cards before you insert them into the Switch. This is doubly important when purchasing a used game. It turns out a damaged Switch game card could permanently ruin your Switch, making it unable to read game cards altogether. The issue comes from bent pins on a game card, which do damage to the Switch when you slot them in. Apparently its become quite an issue in Japan, as a repair shop/second-hand store put out a warning about this issue.