Both Blogger and WordPress are good choices as website building platforms. But...
Neither Blogger nor Wordpress "as is" will build an online business which you get if you know how to do SEO and build traffic. They are both missing a do-able start-to-finish BUSINESS process.
Surely, you can slog through the mountains of business building advice and tools that are out there. But for most Blogger and WordPress users it all ends up being too much.
So, despite the dazzling display of Blogger and Wordpress features (even SEO gadgets), the reality for most (non-tech) people who want to create a web business with Blogger or Wordpress is that they need to adhere to an easy-to-follow, all-in-one, proven, ethical webbusiness-building system (not a get rich quick scheme), tailored to say the WordPress platform, to get (1) a significant amount of traffic and get (2) targeted traffic (example of such a system: WealthPrinciples dot net).
Otherwise... you'll end up having (and building) only a Blogger/WordPress webSITE (or BLOG) but not a webBUSINESS.