he doesn't owe it, but his writing reflects on him and the project. personal blog or not, the writing shows his personality, and that in turn affects how comfortable i am using a project led by this person. if this was just one of many zig developers then it would not matter as much, but as this is the founder and leader, his personality has a major impact on the project as whole. especially in how it attracts contributors, and how long those contributors will stay around.