I have an instagram account because it's by far the best way I know of to keep up with various small businesses, local or otherwise, that I like.

What I go into the app to do: see if there are any updates from those businesses.

What the app presents me on launch: a bunch of nonsense selected for what will best-distract me. And you know what? Sometimes it does catch my attention for a minute or two!

What the app doesn't let me do: disable the nonsense, or even default to the tab of accounts I'm following. Hell they even intentionally broke ways to achieve this with iOS' scripting, you'd think that'd be niche-enough they wouldn't care, but apparently enough people were doing it that they bothered to break it.

The algo feed is addictive on-purpose. I would turn it off if I could, and there's a damn good reason they don't let you do that. I "choose" to engage with it sometimes, which sometimes gets people coming out to go "oh-ho! So your revealed preference is that you like the feed!" but that's plainly silly, as that's highly contextual and my in-fact actual preference would be to never see that feed again in my life, and in fact I've spent a little time trying to make that happen. It's only my "revealed preference" in a world where I've had to compromise by occasionally losing a couple minutes to this crap because the app won't let me go straight to what I actually want. That's my true preference, the "revealed" one is only ever briefly flirted-with in a context in which I'm prevented from attaining my actual preference.

Consider a person who struggles with eating junk food. They don't keep junk food at home, in fact. That is their preference, to not keep it around, because they don't want to eat it and know they will if it's there. Now concoct some scenario in which, in exchange for something else they want, they have to take delivery of a couple bags of potato chips and a box of cookies every week. And sometimes, they eat some of that before tossing it out or giving it away! "Ah-ha, so their revealed preference is that they want junk food!" Like, no, of course not.

There's a reason these apps have to prevent you from using any part of them except with the presentation they like: because they'd being addictive on purpose, and tons of users do not want the addictive parts, at all, but do want other parts.