Since when interior design became a professional service and have professional body? What is the difference? Would I get prosecuted by being unlicensed?

Thanks for replying,

At one hand I feel like it is good to set up standards but on the other hand I feel like is weird that they call it a professional service when it is just design. It feels like giving Ts. title to fine art artists and call them "professionals" which is a thing now.

Interior design should be something intangible and subjective to eye. Clearly interior design feels different from other traditional professionals like architect, engineers, doctors, lawyers and accountants.

I just feel like there should be a better way in solving this instead of doing an ultimate move and split between registered and non registered. This ultimate move would just make registered interior designers having the benefit of doing middle person endorsement and taking all the credits like what architects do.