Accidental discharges would be a problem. When our daughter was single and living with us it seems the smoke alarm went off every time she cooked. I can imagine the damage if the sprinklers went off.
An accidental sprinkler discharge is rare. Most sprinkler systems don’t activate through a detection process like a smoke alarm. Instead, they have a small glass filament inside it that melts and breaks when the temperature exceeds a certain (very high) threshold. In other words, the sprinkler only activates in a real fire — not just in a smoke condition.