Maybe he means that ignoring stealth completely and just running around guns blazing shouldn't be an option? Combat is always in option when you're trying to be stealthy, that's why Sam Fisher carries a pistol... It's just not an ideal situation, as the reason you're trying to be stealthy is because you don't want them to know you're there and/or there would be too much resistance to a frontal assault. So Cell of Duty: Splinter Warfare wouldn't be a stealth game, if pure obtuse action is a feasible way to progress. It would just be a shooter where you can use stealth to your advantage, like Deus Ex.