As an adult, I want a brightly colored hearing aid. I don't care about hiding my disability—in fact I'd rather it be difficult for others to ignore—and I want it to be easy to find if my kids knock one out of my ears which happens less now that they're six but still happens.

Why not? People wear brightly colored jewelry or “statement” eyewear in a professional context all the time.

Are you saying that it’s “professional” to hide your disability if you have hearing loss? If so, then I strongly disagree. It’s a personal choice.

This is your opinion. In many parts of the world, criticizing a piece of accessibility equipment as unprofessional is likely an HR violation, and probably grounds for termination.