Debit cards are a way of life here and have been for 30+ years. Everybody and I mean everybody, pays by debit. We do not have dual debit/credit cards here that I know of and only recently have one or two banks begun offering a debit product that has a visa logo so it can be used for on-line purchases although it does not offer credit - only access to available funds. I’d contend they are just as secure as a credit card in terms of possible fraud. Less maybe because our debit cards have transaction limits/daily limits. You can set them higher if you want but the default ones are relatively low ($500 per transaction/day).
As to another comment you made upthread - having a supplemental card issued to a child on a parent’s credit account does NOTHING to establish that child’s credit history.
Their bank cards are different than ours and the way debit works is different too. It always freaks me out a little when I go to use debit in the States and it doesn’t give me the choice to pay out of my chequing account or savings account.