Dreamland and the Dream Catcher

I've always believed that after we fall asleep, there's always a dreamland are ahead waiting for us! Dreamland, is a world that is created by us, the world that we can control on our own. Rumours said, Dream Catcher can catch any bad dreams and stay the sweet dreams for master of Dream Catcher, then why wouldn't we escape everything in our real life and stay in dreamland, whereby we can create the wonderful things by ourselves? Besides that, why and why? Dream Catcher will not have an ability to catch us to stay inside the wonderful dreamland and stay forever and ever? Or why don't god gives us an ability to create wonderful things in real life instead of staying in the wonderful dreamland and syok sendiri? Haha, I know it's a little bit of forceful thinking, eventhough the dreamland is all remain to our imaginations only. But, without imaginations, this world wouldn't be wonderful as we thought ever. So, never be afraid to imagine, but be afraid to not imagine! 
P/S: Not to fear of escaping, but do fear of not overcome difficulties!