Sure they do, but all of the alternatives are not nearly as convenient. But you can absolutely get by without an iPhone or Android phone with Play services.
The example actually proves the point more strongly than LibreOffice vs MS Office does by the increased level of effort it requires of the user to go out of their way to not actively support the bad things Apple and Google do.
The problem: our desire for convenience
This hits it right on the money. As nice as open source and open standards are, at the end of the day none of that matters to the 99% that want/need to do X as fast and painlessly as possible.
To people like my wife MS Office/LibreOffice/Google Docs are all the same thing in the category of productivity suite. And one of those does not meet her where she lives in day to day life. And it doesn't because there is no money in doing so for LibreOffice. And there is no benefit to her to seek out LibreOffice for her uses.
Hell, just take a look around at the number of people that preach about the evils of Microsoft, Google, or whoever but love them an iPhone and Macbook. As bad as Microsoft and Google can be for screwing over the user with vendor lock-in they don't hold a candle to Apple. But they get the money despite there being "better" options technically and philosophically for nearly everything they make, but Apple knows all of that pales in importance to 99% of potential customers compared to being convenient.
the Trump administration ordered states to revise their plans with a “tech-neutral approach” and lower the average cost of serving each location
In other words don't give the tax payer the best options you can, give them the cheapest options to implement you can.
I tried feeding ChatGPT a Terraform codebase once and asked it to produce an architecture diagram of what the code base would deploy to AWS.
It got most of the little blocks right for the services that would get touched. But the layout and traffic direction flow between services was nonsensical.
Truth be told it did do a better job than I thought it would initially.