The real issue is that they switch up what they are making every few months or so, so the smell changes periodically. Whenever that happens you start noticing the smell again for a few more days. After a few years you'll become pretty good at ignoring that general class of smells though.
From http://en.m.wikipedia.org/wiki/Environmental_impact_of_paper
"Pulp and paper is the third largest industrial polluter to air, water, and land in both Canada and the United States, and releases well over 100 million kg of toxic pollution each year.[5]
Worldwide, the pulp and paper industry is the fifth largest consumer of energy, accounting for four percent of all the world's energy use. The pulp and paper industry uses more water to produce a ton of product than any other industry."
This affects each of us negatively regardless of whether we notice or are concerned.
I don't think anyone can ever get fully accustomed to the presence of toxic chemicals in the air. Your body and mind are doing their best to make sure you're aware of them.