Exactly and I support your analysis. I also think that Arsenal will probably have difficulty winning this match. But that doesn't mean Arsenal will lose, but a draw is the best choice for Arsenal not to lose points when some of their mainstay players are absent from the match.
The young player Nwaneri and the Makeshift striker Arsenal has solved some of the issues they have as a club. Unless they get injured, those two players together can deliver an attack different from what Arsenal as a club were used to, I think.
Arsenal has a good chance to win still, they have to make use of every chance they create.
Indeed, there are quite a lot of Arsenal forwards who are out due to injury but anyway, at the same time the fact is that West Ham are in a bad trend. What's more, Arsenal will also play at home, with these factors I personally believe Arsenal will still succeed in getting three points by beating West Ham. But indeed, with conditions like this maybe Arsenal will not be able to win with a big score but, just by winning with a score of 1-0 is also enough for Arsenal to secure three points at home. So yes, no matter about the number of key Arsenal players who are absent due to injury, because on paper Arsenal still have a better trend than West Ham, so the victory should still be created by Arsenal.