This is a myth. If you already have completed one or more college degrees, it is a myth yet you have a higher probability of success with this modality of college classes (as college classes are not easy whether online or on campus).
Is it “true” that many people are taking online college courses? Yes.
“According to Columbia University’s Community College Research Center, for example, about seven million students — about a third of all those enrolled in college — are enrolled in what the center describes as traditional online courses.” (http://www.nytimes.com/2013/02/19/opinion/the-trouble-with-online-college.html?_r=0)
If everyone is doing it (i.e., it is popular), it must be easy, right? Wrong.