You are so wrong its not even funny.
No u.
Yes, spears are older....thats why they svck. When people developed metalurgy, there was no need for sharpened rock spears.
For sharpened rock — sure. For, well, I dunno, METAL spears? From Iberia to Japan — everyone used spears. African natives fought redcoats with spears, with limited success.
Spears were used to keep people at bay, or on horseback. After the sword-making, an adventurer going about on foot with a spear would have serious disadvantages in single combat.
Are we speaking about history or "adventurers" here?
If we do speak about history, then yes, they were used to keep people at bay. And they were good at it. Pikemen dominated on European battlefields for quite some time. Same was in Japan during Sengoku Jidai — yari and naginata (spear and glaive) were main battlefield weapons.
If we are speaking about adventuring... In Russia, where I am from, a variation of spear traditionally was used to hunt bears. Spear is great choice against larger beasts, and in fantasy game like Skyrim there are a lot of larger beasts. Including dragons.
Spear in single combat — heh. I dare you to attack skilled spearman with a sword. Sword and shield do have a chance, sure. In general, spear is extremely versatile weapon in hands of skilled user. It just does not being used like a pike in formation warfare. Of course, there are situations where spearman is in disadvantage — obviously, tight quarters. But in general, spears (and other polearms) rocks.
Oh, and who says that spear-wielding "adventurer" does not have a sword for situations where spear is unwieldy? Again, my firearms anologue: spear = main rifle, sword = personal pistol or smg, good weapon when spear is not available or not comfortable to use.
Also, saying that they simply are older makes no sense, since South American natives developed sword type weapons with obsidian and other materials. So, spears are older...for whom? Probably your eurocentric mind.
Spears been in heavy use from stone age up to renaissance. South American natives probably came to South America through North America from Eastern Asia with knowledge of spears.