As a bride, it is very likely your duties will include walking down an impossibly long aisle very slowly. Meanwhile a hundred or so guest will scan you up and down. You will be nervous. All eyes will be on you. Your hands will be shaking. This is where the bouquet comes in. It gives you something to do with your hands, other than fidget or flap. In that way, it makes sense.
However, bouquets can be eye-wateringly expensive. So what on earth do you hold in your shaking hands instead? Well, what you normally would, of course. A clutch.
The clutch-instead-of-bouquet option has the distinct advantage of giving you a place to hide your lipstick etc.
And if you’re going to have a clutch, why not replace the bridesmaids bouquets with clutches too. No truly fashion-loving bridesmaid would prefer a bouquet to one of these Nelle clutches.