Machines are more powerful these days! The unix kernel used to fit in a book. How many books would it take to fit the linux kernel?
These days we happen to have in place an efficient communications system, built by these very giants of the past, that actually facilitates getting advice from your peers.
Why do you want to use a framework? Well it's not just about not writing the code, it's about having code that has been well tried in action and honed. Any eventual problem is probably documented somewhere on the net. Write your own core stuff and you'll need do manage the cost of stabilizing the software.