Good Day ramkasturi
I don't think there are any similarities between hub writing (blogging) and journalism. These are two vastly different mediums. At its best, blogging might be vaguely comparable to op-ed writing.
Journalism is about going out there and getting the information, interviewing people willing to talk, those only willing to do so anonymously (though I hear that good journalists do their best to have their sources go "on the record" - an excessive number of anonymous sources is not considered a good thing). Along the way a journalist gets doors slammed in his face - and that's when he knows he's touched a raw spot, which should make him want to keep picking at it.
Journalism is about challenging power, and I would argue, speaking truth to power. Any "journalist" who "spices up the content" is not a journalist but a celebrity reporter or gossip columnist. This thing, hubbing, we do in the comfort of our own home or local coffee shop on our laptops cannot compare to journalism.
Some people actually think that, somehow, the Internet might replace print and broadcast journalism, should they tank. Frankly, I find this preposterous. Journalism (especially mainstream journalism, with all its faults) is absolutely indispensable.
To put it succintly, we wouldn't know a darn (don't want to swear, do we?) thing about the world we live in without it.