1. Are you a professional spear thrower?
1.5 what if you risk the chance of losing it and opt not to throw it but the other person has a ranged weapon, eg a bow
2. Bows and arrows are hand in hand, I don't know where you would find one without the other. That's like complaining that you can have any gun you want but no ammo, or an escape vehicle with no tires or fuel because they are separate things.
you clearly dont get my point. a bow and arrows are not attatched. they are two different items.
You clearly don't have much experience with bows, for starters you would have been shot well before you got close enough to use your spear (assuming you didn't throw it and miss like you most likely would) secondly reloading a bow takes no time at all, thirdly if I did need to get out of the way of your spear to reload I would, it's not like having a bow means you have to stand in one place, reloading and running/moving backwards is hardly a challenge.
heres a scenario
you have one weapon. you have a bow. what are you going to do, hit me with a bow?
and, even assuming you have arrows, what i sneak up on you and stab you straight through the chest? game over
and ill have you know i throw spears in my spare time to get ready for disasters, so yeah, id consider myself professional.