It's called the parking brake and it's for parking. You have the pedal for when you're driving. You can use that while leaving from a hill, it's really not that difficult, you just hop from the brake pedal to the biting point on the clutch.
I mean it'd be sort of a removed on the clutch if it's like a 40 degree hill and it's a rental and it's the first time you're even moving it at all and you've no idea of where the biting point is, but you should never be in a position where that's the very first time you drive a specific car. And after having driven a car once, you ought to know the biting point.
Thus, "handbrake start"? Noob shit.
3rd gen (former) taxi driver
edit my dad also taught me how to switch gears without the clutch without raping the gearbox. all about giving it a bit of gas while it's off gear to match the rpm's. it's rather trivial once you get the feel for it, but you need to understand the rpm range the gears can do obvs and not downshift while on high rpm or something like that
Well the most use we ever got out of parking brakes was when driving front wheel drive cars in the winter so you can lock your back tires so you can slide around the snowy corners.
I bought a new car with a manual transmission this year. It has a cool feature called “hill start assist”. Basically for the first 3 seconds I won’t roll backwards. It’s been nice.