These themes are more bare-bones. That may be a good thing, depending on your needs, as I've found that ThemeForest (and WrapBootstrap even) themes tend to be very opinionated and JavaScript heavy, filled with features that I end up spending time pulling out anyways.

Because you might not have the budget for a Themeforest theme ?

Extended licenses, which you need for a Saas product, are around $800 or $900, which is affordable for a business (still way cheaper than hiring a designer), but far from free.

I feel like they serve two different purposes. The ready-made professional templates are finished/polished, I just need to fill in the copy/images. These are starter templates, I'd use these and add on my own styles to create my own unique design.

These are very quick and easy to use for an MVP.