Bonus attacks are an exceedingly boring way to use my turn. I don't play the game to make numbers change. I play it for drama and action. If the only way I interact with an enemy is by hitting them for damage, I'll be bored out of my skull.
I want a suite of interesting options that I can use to gain benefits in combat, or to disrupt my foes, or to help my allies, or just to do neat stuff.
I once played a Pathfinder campaign to 17th level, and my character was a Brawler, the class that lets you switch fighting styles by gaining combat feats temporarily. I thought it'd be neat to be able to change my tactics based on what the encounter demanded. Instead, it was almost always optimal to just make as many attacks as possible, to try to do as much damage as possible. Any sort of cleverness was inefficient. I hated it.
So I'm intentionally making a character that doesn't get three attacks, in hopes it will motivate me to do neat stuff in combat.