Modern kerbs are sloped. Accidentally not noticing the kerb will not make you crash. (See the picture about ⅓ down on https://bicycledutch.wordpress.com/2016/02/23/goes-cycling-c...)

Research shows sloped or even leveled kerbs don’t seem to lead to problems (https://journals.open.tudelft.nl/ejtir/article/view/3254)