It is an extreme advantage for a small element to have suppressors, when the enemy does not. In combat, the distinct sound and light signatures of friendly and enemy weapons are very important for both sides to assess the action and identify key opposing weapons.
If you’re suppressed and he’s not, he’s got a whole lot of kaBANG going off close to his ears, and he is going to have a hard time detecting, let alone locating, the toonks your suppressed weapons are making.
Since suppressors are cheap — they’re only $50 to $100 worth of machine time and material, in series production, or only $1000 to $2000 after the overhead of the Defense Acquisitions Process is larded on to them, which is still cheap as DOd buys go — the time will come when everybody has them. That time will come very quickly to all the world’s armies as they start to see the results of firefights with asymmetrical use of suppression.
The counterpoint is that doinkers lose.