I think the "point" of contactless is to make the transactions quicker. Where it used to (in the UK) take 30 seconds to put your card in the chip and pin machine, enter your pin number and wait for the transaction to be confirmed, now its literally 3 seconds. Over the course of a year that is a massive time saving for the retailer and so a cost saving (less staff).

With chip and pin the customer was liable for all transactions when their pin number was used. It was your responsibility to ensure it wasn't exposed.

Now with contactless there is no risk to the customer, the bank/retailer takes on the full risk of fraud for contactless payments. You will not be out of pocket for a fraudulent contactless transaction. This is why contactless transaction are limited to £30 (initially was £20), it limits the bank/retailers potential exposure to contactless fraud, its also handily set to just about the average card transaction in the UK.