That's about what you can do. If the product is attractive enough it will draw attention to it. And if not, advertising won't make up for that.
A project can attract attention only through advertising. For projects designed for strategic purposes, this is not enough. For fraudulent projects, it is enough to attract attention for a short time.
I agree with you. Advertising is needed only to attract attention for some time. Then everything depends on the project itself, its ideas and how the team will be able to implement it