Yes definitely everyone can be a content creator because the STEEM dapps made this possible. If it were during the days when the dapps where not available I'd have said it's impossible, because steemit then was built to accommodate mainly the writers,

But with the inception of the dapps really everybody has a space no matter what they can so or not, be it singing performing, writing, or even writing reviews about food and restaurant or even photography.

And now most recently musing.io I however know that other dapps will surface and steemit will become even more decentralized by the day