You forgot to read the next sentence.
And in addition to that, you'd need to be able to consistently engage on the platform and network with your peers and followers to expand your audience.
Also - this was written in response to "needing" delegation. Context matters.
And just so we're clear - I'm not a fan of the amount of paid voting bots that are operating. But if we really look at the paid voting, the returns are about as good as leasing delegation...which is to say that they're not very good. If you want the most bang for your buck when it comes to SP, it's still better to just earn it by posting/engaging and networking or by purchasing the STEEM outright and powering it up.