Apple TV+ subscription still asks me to pay for movies/shows?
I signed up for the 7 day free trial of Apple TV+ shortly after it launched, and to my surprise, when clicking on a movie, was prompted to pay for said movie (e.g. when clicking on The Lion King, I am given the option to buy for £13.99 or rent for £4.49). It appears to be the same for most TV shows as well, although I've found some which allow me to click "Play Episode" without a prompt to pay (e.g. The Morning Show), although I didn't check before signing up, so these may well have always been free anyway.
I was expecting to pay the subscription (or free trial, in this case) and have access to all of the available movies and TV shows on Apple TV+ for the cost of the subscription (like Netflix), but it appears to me that I actually have to pay the subscription fees, and then on top of that also pay to purchase or rent each individual movie/show!?
Please advise me if I've missed something as I've now wasted my "free trial" because I couldn't find anything to watch without paying extra, and the subscription has now renewed because I forgot about it since I wasn't using it. Not very happy.