Answer
Yes, the code on the back of the card warrants attention: it has been recommended that you erase the security code to reduce the risk of losing funds. This is particularly relevant if the card is often used offline or may fall into someone else's hands.
The logic is simple: card data consists of more than just the card number and expiry date. The security code helps verify transactions, so leaving it visible increases the risk of unauthorized use if someone sees or photographs the card.
It makes sense to erase the code only after the cardholder has securely stored it in a safe place. It is also worth enabling transaction notifications, not keeping the PIN near the card, and keeping on a day-to-day card only the amount needed for current expenses.