Can a client request a tattoo without creating an account?
Making a client create an account before they can even ask about a tattoo is a good way to lose them before you have said a word. Most people looking for an artist want to send photos, describe an idea, and see if it is a fit, not set a password.
A request or consultation form that works over a simple link, no login required, removes that friction. The client fills it out on their phone in a couple minutes and you get a clear picture of what they want before any conversation happens.
The account, if there ever is one, can come later, once the client is actually booked and you want them to see their history or gallery.
Turbo Link's client portal works this way for existing clients, with a magic link or a 6-digit code instead of a password, so nobody has to remember another login just to talk to their artist.