Any given person is only going to care about some small fraction of the media available for watching, and when that fraction is spread out across 6 different streaming services, the "value" they're getting from any single one of those is fairly small.

Furthermore, similar to what ldhough says, many of us remember when we could get basically all that content on Netflix, and we know perfectly well that a) the content providers could be making reasonable amounts of money through a streaming deal like that, and b) the reason they decided to launch their own service is one part insatiable desire for ever increasing profit, one part unrelenting crusade for absolute control over everything they own. Nowhere in there is "value to the customer".

There's a quote that I've seen go 'round a few times, to the effect of "the streaming services really need to remember that their entire value proposition is being slightly more convenient than piracy."