Here's a picture of some of the chargers and cables I have accumulated over the years, next to one of my more recent purchases - a 140w multi-port charger. You will notice that I have not bothered to unwrap my apple cables either.
People are not going to say no to free things. Given the choice between taking a free charger or otherwise, who in their right mind would turn down the option of taking the free charging brick when doing so does not cost them anything? Even if I don't need one, what's stopping me from still taking one anyways, then tossing it into the bin days later when I don't have space in my drawer for it?
The thing is - it is possible for Apple to do something that is environmentally conscious, while also benefiting its bottom line. These two are not mutually exclusive. Given that Apple sells more than 200 million iPhones a year (and I am being conservative here), removing the charger does mean a ton of potential e-waste avoided. At the same time, the packaging is smaller, meaning you can transport more iPhones at a time, meaning fewer trips, resulting in a lower carbon footprint a well.
At the same time, it can be argued that all these monetary savings help to avoid what might otherwise have been a higher price for the iPhone (but we will never know, since it's hard to prove a hypothetical).
I also see it as an opportunity to consolidate my charging setup. For example, instead of using 3 separate chargers for your iPhone, AirPods and Apple Watch, you can charge them all using one of those 3-in-1 MagSafe chargers. Power strips come with usb-A or even usb-c ports nowadays, letting you charge smaller devices without needing a dedicated brick. My Anker 67w charger chargers either my MBA, my Nintendo Switch, or my iPad at my desk.
People nowadays own way more electronic gadgets than they did a decade ago and single-port charging solutions just don't cut it any more these days, IMO.
Update - I uploaded the image via Tapatalk. Odd that it appears in the app, and when I am editing this post, but not when I am viewing this post in the browser (both Safari and Chrome). Do let me know if you are not able to see any images on your end as well. 😬