Fleming's Steak House and its ilk are canny marketers. They have made a fortune capitalizing on the notion that people like to celebrate achievements by paying large sums of money for hunks of meat quick cooked in dragon fire. No one ever closed a big business deal and took the team out for a salad.
When our ancestors downed an auroch with the final spear or ran a mammoth off a cliff, meat was the reward. It's likely hard wired into our genetic memory. Steak is for winners.
It sure beats the hell out of franks and beans.