Two kinds of maker
There are good makers built on galleries. You browse designs for the occasion, pick one, swap the placeholder text, choose colours, export. They produce lovely things in capable hands, and they assume three hours you do not have and a design instinct you never asked for.
The other kind is a conversation. You say what you are planning and someone hands back an invitation that already reads properly, because it was never decorated — it was written. Jitabi, our WhatsApp assistant, works this way. Your sentence is the brief; the draft is the deliverable; the chat is the revision round.
Neither is strictly better. The gallery suits the person who knows what they want. The conversation suits the person who knows who the party is for but not what the font should be. That second description fits most hosts, and most of the time the second tool is the one that actually gets used.