The main background issue is a lack of supply if you are not in a place to hire worldwide remote (which many companies are not).
As a small company, doing the communications required for doing recruitment all in-house, as well as getting your job listings out to where people will find them is hard. However, using Recruiters is expensive and they have less ability to do quality filtering of applicants, especially since they are driven by commission more than quality so I think they would rather get us to interview someone who isn't a great match "just in case".