These cupboards are push to open, Not my cup of tea but appeal to some. When knees bump the base doors, they open and can cause discomfort and pain if not noticed.
We often do kitchens with handles on base cupboards and no handles on top cupboards. Handle-less base cupboards come at a considerable extra cost.
Below is another style of handle-less kitchens, they use a finger pull recess in the base cupboards and similar on the top cupboards.
There is a little less height access space in the base cupboards but can be very pretty.