Why is Blogger so weak on SEO?
What many folks just don't realise is that Blogger leaves the SEO to us - because Blogger supports other folks rights to publish their blogs anonymously, and without SEO. It's your choice - and it's your effort to make - either way.
The choices, provided to us by Blogger / Google, are quite basic.
Which ever decision you make, controlling the search engines is a key step, on the way to anonymity - or to fame and fortune. And use of Google Webmaster Tools is a key process, in controlling the search engines, and in evaluating success.
In either case, learn the issues involved, in fulfilling your personal goal. Don't expect Blogger to do it all for you.
Make your blog a combination of what you want - and what will please your readers.