A business website should not be built only for launch day.
It should be built so it can grow.
Many small businesses start with a website that looks fine at first. Then, after a few months, they need to add a new service, answer more customer questions, support Google Business Profile, write articles, or prepare for ads.
If the site was not planned properly, every update becomes awkward.
A stronger website gives the business room to grow without rebuilding everything again.