But even in Native, you ignore Tactics at your own risk. In some mods, the Tactics skill has a lot more uses: you ambush the enemy, choose the terrain for the fight, choose a companion to act as a commander, form your troops before battle, etc. It's going to be even worse when it is time to siege some hard to take fortifications, especially if they are a faction's last. Without Tactics, get ready for a rude awakening. But guess what, once you enter the middle and late game, battles with 2000+ combatants happen regularly. Tactics' value is very much reduced when your battle size is higher than the maximum number of combatants.
There are very few skills that are completely useless.