>only one streaming platform with pretty much every movie and tv show

doesn't this move reduce the number of streaming services by one? we'll see how the details turn out, but if I was paying for netflix and hbo max, now I only need to pay for netflix

Yes but it doesnt increase the amount of shows or movies on any of them. This new amount of content will just feed into the rotating library, not create one big library of content always available. So in fact you are loosing providers and loosing content at the same time, yet prices will still keep going up...