Look, why would you subject yourself to the horror of a high-impact compression bra if you didn't have to? One of the many, many (perky) perks of having small breasts.
Regular bras aren't quite as bad as high-impact compression sports bras, but they're still no walk in the park -- there's a reason why they're colloquially referred to as "boob prison." Since you don't necessarily need the support, why not let your girls run free? It's a personal choice of course, but it's one worth considering if it's something you feel comfortable with.
We all know the feeling: you see that perfect dress -- only to try it on, and have it be way too big in the whole chestal region. "Why are these darts so big?" you probably wondered to yourself in the dressing room, "Was this thing made for a buxom milkmaid?"
You may or may not have given Kylie Jenner's push-up bra of choice a try (AKA the Victoria's Secret Add Two Cups Bombshell Bra) at some point in your life, but gravity-defying padded bras or no, you've pretty much given up on the abstract concept of cleavage.