Even my Galaxy S7 Edge from 2015 came with an undeletable Facebook app. Why is the article portraying this as a recent development?
And actually since back then Facebook apps have become easier to disable on most Android phones. Used to be that you couldn't delete them nor disable them on most phones. Nowadays is usually possible to disable the apps, and they are usually just stubs, so their impact is minimal to null.
Still would rather not that have them shipped, but when it comes to bloatware I'd say Google was a much bigger culprit.