Find familiar is a 1st level ritual with great utility on this front. Barely any resource cost whatever.These are high level divination spells − that burn up slots − or require the Wizard to already be "familiar" with the location in the first place.
Arcane eye is mid level at best and will map out an area at little risk. Plus if the wizard is a divination wizard, they get some slots back just for casting it. It requires no knowledge of the terrain.
scrying is 5th and does require SOME knowledge but it's not fully essential (though it will make the save harder).
If time is not a factor, they scout 1 day and do what they need to do the next. Resource cost averted.
And no one is saying there's no resource cost, just that the Wizard has many options and the fighter has few-none.