Wow. Obviously you've never studied battles.
Ok, wrong #1:
IRL, *MELEE* weapons are (in general) *MUCH* more powerful, *IF* someone has the skills.
For example good sword (again, Master/expert skills) could *EASILY* cut off a LIMB! *WAY* more damage than a handgun, & more than most rifles. (except machine guns/auto of course---but even a 3 round "burst" would do *LESS* Dam!)
Gun: hole in....
Sword: Loose the whole body part! (anybody missing a HEAD?!?)
Wrong #2:
No ammo (realistic) is a "trade off"----both IRL, & in-game.
Guns get 2 "shoot first, ask Q later" ; Melee must 1st ***CLOSE DISTANCE*** [although IRL you'd have buildings/trees/obstacles to help] so in OPEN areas, R weapons have HUGE advantage. But in tighter areas/close quarters, etc Melee better. (In-g: loose 1 turn to "charge")
*PLUS*, both IRL & In-g, Melee weapons req a *LOT* more training! (In-G: Dam inc by STRENGTH, so you need 2 stats high! R weapons only need 1 stat high; [ideally, both need Dex too])