My cousin runs a flower farm and she told me the wholesale price on those specific roses dropped by half last year. A lot of florists are just trying to keep their doors open, so they use the affordable stuff that still looks good. It's less about being lazy and more about staying in business. The fancy, unique flowers can cost three times as much and spoil way faster.
Yeah I always thought it looked lazy too, but @kim_hart7 has a point about reliable sellers. Changed my mind once I realized they're probably just giving people what they keep asking for.