For each course on the landing page you get a button with a suggested action like continue; chat; review and so on. For free members it`s part of the advertising to also suggest locked actions.
But mostly I review words and occasionally I learn new ones when finished reviewing. So for me it makes sense to fix the review Action as fast Access to the button.
P.S.: I recognised that you fixed several Errors, close decks, so I decided to renew my pro subscription. I noticed that download is now working, thank you for that!