Jynthor said:
Yeah, join the dragons and let Alduin eat the world, tell me how that worked out for you.
Alduin eating the world isn't necessarily a bad thing. He has done it countless times because it needs to happen eventually.
The Dovahkiin was only sent to stop him because Akatosh who is Lorkhan thinks this Kalpa has a higher chance of finding CHIM then the previous ones.
Should the mortals fail at finding CHIM, Akatosh/Lorkhan will just send Alduin back to murder everything and let no one stop him.
Systematic annihilation of all mortal life then recreation of the mortal realm and creation of new life till a cycle can find ultimate enlightenment.