You're not wrong that this is short-term easier to establish an audience, but your long-term goal is to get to a point where a hypothetical reader of your blog will say "Well, yeah, you could find that topic anywhere, but personally I'm more interested in $NAME's opinion on the topic".

The best way to establish that is put out really good content until you've built up enough blogger 'cred' that you can tell me about other parts of you and I'll just wanna know.