@Kathy408 Considering that Airbnb has millions of listings worldwide, it wouldn't be practical for them to have someone personally check out listings for accuracy, which is why you can report a place for that as well as have it be part of your review.
And, if you want to take it that far, when you check in to a place which is not-as-advertised (barring things like the Wifi being temporarily down for reasons beyond a host's control, like an area-wide outage) you can contact Airbnb after you check in to report it and request a refund. But if you don't report it and just continue to stay, asking for a refund after the fact, that's not a good approach.
Also, if something is missing or not working as far as amenities go, it's always a good start to message the host first- they may not be aware of the problem (some have property managers or co-hosts who may not be that diligent), so you should at least give them an opportunity to correct the issue. Previous guests may have stolen something, messed around with the modem, requiring a reset, or inadvertently switched off a breaker to the hot water, for instance, without the host realizing it.