They're the gift that's meant to be forgotten
Sure, there are plenty of gifts out there that are meant to be discarded -- cookies, birthday cards, Edible Arrangements -- but only flowers are thrown away because they start to rot. If you have roses, they turn black; any other kind of flower will lose its petals all over your coffee table and remind you of the sheer fragility of life. Even worse, if you don’t put your roses in the trash, you get that awful stale smell of vase water and dirt. Now you've got olfactory warfare, along with blackened roses giving your home an early 2000s emo vibe.
They don't satisfy all of the senses
Not to harp on the whole baked goods over flowers argument, but you just can’t eat flowers, despite what some precious farm-to-table restaurants might like to tell you. Flowers look and smell nice -- I’ll give you that -- but doughnuts look, smell, taste, and feel nice. Have you ever held a fresh, warm glazed doughnut in your hand? It’s like holding a baby -- a baby that will soon be making its way back to your tummy. Is this an argument to slowly phase out flowers for pastries? Hell yes.