Well, like with "national politics" (what nation?), even if there may be only two options functionally, it's also just pretending that there are only two options there at all. (while almost actively ignoring any other options)
Like, while it may sound annoying and nitpicky, android is not just "one option of the two", it has a bunch of versions/flavors/forks/whatever you wanna call it, that vary between manufacturers, and also alternative distributions that can be installed on devices, situations that iphone just does not have, at all or to that extent. (quite linuxy in that way if you squint real hard.) I'm struggling to worry about this whole debacle with google floating about whatever they're floating about (currently it's that vague) all that much, when android is that malleable.
There are also actual Linux phones and distributions, postmarketOS, environments like Phosh and Plasma Mobile, Ubuntu Touch, Sailfish, and so on. These can also end up being treated as a "third option" when it's a bunch of different options, or even treated as non-existent, but these options are out there, available, modern, with phones you could just buy. The only case where "one option" is actually just one option is with iPhones.