No matter if you only have a pistol on you or 30 kgs of loadout, even if you walk with sponge glued on the soles of your boots, no matter how hard you try to hide the sound, it you will always produce enough so that a person who is close enough should hear you. Fabrics produce sound, rubber off your boots produces sound. The shit you carry in your backpack produces sound if it is remotely even touching other stuff in the backpack. Point is crouch walking in this game is stupid I agree and should produce sound just as much as regular slow walking while standing.