It's true, hear me out.
Beginning sewers have issues with pattern understanding and the basics of the different terms used in sewing. Outside of taking classes, it can be difficult to understand what all of those tiny marks mean on conventional patterns.
And yes there are thousands of books available. But many of the ones that are free are meant to be read in conjunction with taking a class or having a more advanced seamstress where you can ask questions.
The gap is where no seamstress are available to question and either there are no classes available or they are too expensive.
This is the gap that sewing pattern blogs can easily fill.
So I post free patterns all of the time. It doesn't mean you have to sew those particular patterns. But watching the videos and reading the blog post can really help you understand things like putting in zippers, hemming curved hand and many other sewing issues.
And there are so many sites that gather free patterns in huge lists like this one on at Mood Fabrics and here on Reddit.