Soon after the Google Panda and especially Penguin exposure, the webmasters understood that all the doors that lead to poor and copied content had been closed permanently. The new era of digital marketing started since 2012 when Google drastically spammed poor and copied content.
In this lieu, SEO marketers find guest blogging to be one of the most resourceful ways of enabling effective marketing. They buy guest posts from talented writers/bloggers carrying the goodwill for writing high-quality guest blogs. So yes, SEO professionals want to share quality information with their audience and wish more traffic flow by strategically link building through guest blogging.