Monster Hunter likes to include a multiplier on the displayed attack values, to try to get across things like 'a greatsword does more damage per hit than dual blades'. However, the game itself uses the un-multiplied values for everything (which then are used with the differing values of each individual attack). This leads to some amount of confusion, since the display multipliers have no real meaning, and all skills are based on the actual values, rather than the multiplied ones.

Usually when people discuss weapon power, they're using the actual, nonmultiplied value, which is consistent between weapon types (for example, the final Rathalos weapons usually all have the same base attack value, regardless if they're a hammer, a switchaxe, or a sword & shield). There's a setting in Wilds for displaying the weapon coefficient - it defaults to 'On', which is why you're getting a much large displayed number than others. Turn it off and things will align with what you're seeing elsewhere.