The reason to have one is not the blog itself. It is that content answering specific questions is how people who have never heard of you find you, and how AI systems decide whether you know your subject well enough to cite. That mechanism works, and it requires a volume of genuinely useful writing rather than a page labelled news.
What determines whether it produces anything is what you write about. Broad informational topics are heavily contested and increasingly answered directly by search engines before anybody clicks. What works for a small business is the specific end: what something costs, how to choose between two options, what happens when a particular thing goes wrong, and questions tied to your actual location. Those attract fewer readers and a far higher proportion who are deciding something.
The material is already in your inbox. Every question a customer asked you, every objection that came up before somebody bought, and every explanation you have given more than twice is a post that will perform better than anything you would invent. That list is finite, which is fine, because twelve genuinely useful pieces outperform fifty thin ones and are achievable at one a month.
If you cannot commit to a post a month for a year, do something else instead. A well built page answering your five most common questions, kept current, delivers most of the benefit with none of the abandonment risk. That is a legitimate choice rather than a compromise, and it is the right one for a business whose owner does not enjoy writing.
If you do start, publish the first three pieces before announcing anything. A blog with one post reads as an experiment, and the reader has no way to judge whether more is coming. Three pieces establish that this is a thing you do, and it also tests your own appetite honestly before you have committed publicly. The businesses that abandon blogs usually published the first post the day it was written, discovered the second took longer than expected, and stopped somewhere around the fourth with the page still linked from the main navigation.