You’ve got a spare tire don’t ya? Bet you don’t have a spare battery. The least you could do is spend ten bucks on a set of jumper cables and shove them in the trunk.
Don’t say “I don’t know how to use jumper cables” or “I don’t know anything about cars”. That’s not the point. You can find somebody in a parking lot that knows how to use jumper cables easier than you can find someone with jumper cables because . . . you people won’t keep jumper cables in your car!
In my day, you didn’t start the car unless you had everything you needed to fix the car with you. Major parts excluded, we carried tools, jumper cables, tires, flashlights, spark plugs, oil, water whatever . . . it was in the car.
I think car manufacturers should put jumper cables in new cars just like they do spare tires. The cables would cost them $10.00, they could charge the dealer $50.00 and the dealer could charge you $100.00 for jumper cables. It’s a win - win situation. Who knows, it might single-handedly save the entire US auto industry from bankruptcy.