It sustains their life and thus serves an important purpose.
> Also unlike kitschy stuff you buy and just sits there forgotten, you appreciate them, you have to somewhat care for them, they add value to life.
Kitschy stuff is another ecological disaster, separately from cut flowers. People who appreciate flowers generally buy potted ones and care for them; cut plants are meant as gifts or decorations, and they get thrown away immediately (think of all the decorative flowers on social events) or after they wither (ain't nobody has time to care for the gift roses in the vase, or even notice them).
> I feel like what you are saying is you don't like flowers so no one else should.
I think GP is saying something else. They're taking a systems-level view. Flowers are cool, but we've created a system in which huge amount of energy is used to manufacture and ship around what amounts to reified mating signals, that could be manufactured and shipped locally instead. Now it would be fine in the era of free energy and matter replicators, but we're still in the era of scarcity and looming climate change. So it's fair to ask questions about unnecessary waste in the system.