I've been writing a blog about atheism and related topics for several years. Does the fact I often write about atheism mean that I want everybody else to become atheists? It could mean that. It is possible that I write about atheism because I'd like to persuade others to be atheists. But must it mean that? No, not at all. Persuasion is but one of many motives for writing.
Christians can write about Christianity without wanting their audience to become Christians. Persuasion isn't always what drives them. I've known plenty of Christians who enjoy talking about Christianity. While some do hope to convert others, many don't. They talk about it because it interests them or connects them to others. They have little interest in proselytizing. These things can be true of atheists too. I suspect that they might be more likely to be true of atheists.