Some RTSs are like this. In AoEIII, all you could do was get as many troops as possible before attacking your enemy. I had to create strategy in that game by sending in half of my army to one enemy, and while his allies were sending their troops over, I'd swoop in and eliminate them.
Sure, in the end you are sending in your army to wipe out the enemy. Yeah, that's the point of the game. Kind of like how in shooters you have different guns and weapons, but in the end your goal is to aim and shoot the enemy.
Even though I've been a huge fan of RTS games my whole life, I totally suck at them. I like to have fun. I like to create strategy. My favorite RTS of all time is AoEII. I like to have 5 fortified walls around my base with several castles and bombard towers while I cut down trees to create a path behind the enemy base, then convert their villagers one by one before they forfiet. I once sent in 20 monks in a weak base. They sent spearmen at me from their barracks one by one, and one by one, I converted them. I had a wall of spearmen so their spearmen had to walk around to get to my monks. They eventually forfieted. Have you ever walled off an enemy's gates? It's awesome. They won't know what to do. Just get some archers outside and boom, you've got an enemy stuck inside their own base.