That video doesn't make the conclusion you come up with at all.
Even with xG it says "it's far from perfect and hard to calculate compared to other sports".
The central premise that there are so many moving parts to football, and loads of permutations of how things will play out is a good one. But it doesn't follow that suddenly all stats are inherently flawed. Just that they're harder to usefully calculate and interpret. In other words you'll need some very skilled people to do so.
The thing I like about xG is it brings the concept of variance into the mainstream. People say it's a results based business but this is often taken too far.
"Eddie Howe got it spot on today and Newcastle move into the European spots"
"Eddie Howe got it totally wrong and Newcastle find themselves in the bottom half of the table"
Give us the ability to rewind time and replay a match and those are two perfectly normal headlines you'll see for the exact same setup. In one reality we converted that chance early on. In another we didn't and let the other team into the match.
Also apparently YouTube/The Algorithm/Me doesn't like Europe. Bit harsh on Salah too. In fact wtf is going on here