The people who make these predictions, presumably do so on the basis that they have no information about what’s in the minds and plans of those at the club responsible for recruitment. I presume also that they’ll have their own opinions and ideas about other longer established premier league clubs and how they compare with us. They only have one season’s performance to go on. It’s probably why they always have the newly promoted clubs as favourites for relegation. They have nothing to compare them with - except the championship clubs they played last season, they also have no idea about who or how they’ll recruit etc etc
If, of course, it’s a computer or AI doing the predicting then the same criteria applies except for the opinion bit - which is also influenced by personal judgements including pre-judgement (aka prejudice).
I have no understand of what xg is, apart from hearing it mentioned or seeing it in posts on here. I have no desire to find out.
In conclusion: who gives a shit. What will be, will be.