two things: Battlesuits and Kroot. (and that Orks technically aren't known for their accuracy so while they cant hit the broadside of a barn Battlesuits leap into position and Kroot be all quick and sneaky for stabbies...) but then again that argument goes out the window if you look at Ork accuracy in Space Marine.... T_T
Ork may miss their mark 9/10, but when your collective squad is chucking out as much dakka as an Ork, it really doesn't matter. With Ork shooting, it's not about that one precise shot, it's about hucking enough bullets at your enemy that missing isn't an option. Da Orks iz gunna Dakka dem gitz gewd
Technically, orks only miss 66.66% of the time. And who says orks can't aim? The lore never stated that orks are completely incapable of aiming, its just that they could care less for aiming and just want to hear the sound of their shootas. I bet an ork could hit a bullseye from a mile away if he really set his mind to it, and had the proper weapon. Plus, orks still have the ranged advantage in close combat. They'll put that long barrel to good use, I assure you.
This picture alone sums up every single Tau fight. You literally can't expect them win in any REAL fight if they enter melee combat because they are basically screwed. I mean just look at their biology. Sure they have battle suits and OP ranged weapons except that in this argument...you're fighting Orks. That means 10-100 times the amount of troops you have charging at you. They ignore most wounds that would kill you and nothing is worst than an angry Ork especially if they have something in their hands to stab, bludgeon, or smash you with. Through sheer weight of numbers, they will kill you unless you can bring something bigger to bear. Look at Ork heavy weapons....they're four times the size of a human sized one and THOSE do a number on Tau. 10/0 Inquisitors agree the Orks would win.
I'm a bit confused why there is a kroot at the end of your argument I'm just going to assume it's to show how 1 lowly guardsmen is as strong as a kroot physically and if you look at it kroot are slightly worse them orks in TT less ws same bs but I guess they go first ? Any who I totally agree with this. If we are talking orks with what normal people consider sniper rifles as in long range slow RoF which literally doesn't exist in ork kulture the closet thing would be a massive canon think along te lines of DoW 2 beamy deffgun it's a lascanon for crying out loud id like to see some 4 up armor against that or orks in melee which completely and utterly out class the tau in most melee scenarios and mean the orks beat tau in melee because try are twice(ish) the size of a tau height wise are physically on par strength wise to a SPEHSS MAHREEN who as we know will tear through tau. And also ork snipers are actually flash gitz so yea prepare to drown in DAKKA and lead