I disagree but only once one leaves the promotional period, non-promotional costs for cable (and almost always internet/cable package) are astronomical.
Prime is also a different animal though. Prime video is simply a byproduct of something else people are paying for and not someone everyone goes for.
I pay for internet through Spectrum, then have Hulu Live, Disney+, ESPN+, Netflix, Apple TV, Paramount+, HBO Max and we still pay less, with a lot more content available quickly. It's only more when you include Prime Video, but again that isn't why you have Amazon Prime, it's just a bonus....and we'd be paying for Amazon Prime whether we had cable or streamed tv.
Also, the bigger cell phone carriers often offer one or two of these services for free included with your service. We don't pay for Apple TV, it's included, however even if we were we'd still be about $30-40 less than we were with cable.