I would agree with most of this if you took out the misogyny, and I’ll add that approximately 90 percent of the people I dine with on a regular basis are Young Attractive Women, and somehow we all manage to split the bill without issue. In fact, there is often too much money on the table, because no one wants to be That Guy who screws everyone else. Weird.
Also, makes me glad that none of my friends are pains in the ass who will go to dinner with 10 people and then insist that we itemize the check instead of just dividing it evenly. If you came late and just ordered a glass of wine, fine. But “you ordered the salmon and I only got a burger” is irritating, impossible to calculate in large groups, and makes the waitstaff hate you when you hand them 10 cards with 10 different amounts to charge, which never actually add up to the total cost of the meal.
This is also why I hate enormous group dinners. Four people is plenty, thank you, unless it’s someone’s birthday.