> I do not see any advantage of phone manufacturers providing it over users buying it from third party manufacturers.
Sooooo many people whose display gets wrecked or walk around for years with ever increasing shattered lines and therefore severely decreased robustness and lifetime, just because they didn't get the rubber thing in the first week after they got it[0]. As long as you got yours, right?
I mean, really you should be arguing the disadvantage of the manufacturer including a €1 piece of molded rubber with a €600 purchase. They also put a plastic screen protector on it, right? (at least my S4 came with one, already applied, just below another more loose sticky packaging foil that came off after a day or two).
Make it boring black, just for protection until someone picks their cute custom case.
A great analogy is another fragile fashion item worn daily are glasses. Ignoring the cheaper below-€100 models (nothing wrong with those, just not for this example), but if you get a model over, say, €350 (let alone approaching the price of a smartphone), you expect it to come with a damn case. I might honestly get up and leave if they had the nerve to charge me for it (boy, do I ever hate upselling) And glasses don't even break if you drop them (because they're not made of glass, in case those of you blessed with perfect eyesight were wondering).
I also find it weird how most laptops don't come with a basic reinforced cloth+zipper bag.
One time it didn't make sense was a small frying pan that came with a cloth bag. Still not sure what was the point of that. But if a manufacturer of €40 frying pans can do it, even if there's no real reason for it ...
Seriously, benefit of the doubt is over.
They do all of this because don't want smartphones to last very long and try their hardest to put the blame on the owner (which they want to be "consumers", but you don't "consume" cooking utensils and eyewear either), trying to hide that they're manufactured this way.
It's wasteful and frankly I have heard enough of the idea that buyers don't want to pay for quality. Because the non-quality is overpriced and the quality is unavailable to choose for. Why wouldn't I pay 3x the price for something that lasts 4x as long (or usually much better even), and the nerve to push that on the consumer instead of the manufacturer even daring to offer this planned obsolescence shit.
[0] I tend to default to "no" if someone tries to upsell to me after an large purchase. Because my smart-decision-making juice is usually depleted for the day and I'm out of spoons. The times I give in, I end up with suboptimal useless crap. Even the smartphone case I got the very same day turned out to be all manners of "just wrong".