Bruh, stop moving the goalposts. A lot of Batman's technological and mastermind prowess came later too. He has generally been a detective that can fight, not some I can beat anyone with prep-time machinations. We just can't pick and choose when certain powers came about...again it's about whatever goofy ass writing they choose to do, which is why Batman vs. Superman is such a dumb story. It depends on Batman having a suit, a kryptonite bomb, Superman being off his game and not willing to fully fight Batman, a bunch of dumbass what-if's that generally shouldn't happen 99.9% of the time.