The Jesuits with whom I live and work take varying approaches to the issue of attire: some never wear clerics, some wear them for part or most of the time, and some wear them all the time (indeed, one priest in my community goes a step further and regularly dons a traditional Jesuit cassock when going out to do pastoral work). Though we rarely discuss such matters in community, I'm sure that each Jesuit could offer his own well-articulated rationale to explain why he dresses as he does. Given the diversity of the global Society of Jesus, it would be unwise to try to generalize too much about Jesuits' attitudes and practices in this area. At the very least, I should emphasize that anyone who presumes that Jesuits never wear clerics is quite mistaken - even if the Jesuits that you know don't wear clerics, you shouldn't take their example as representative of the universal Society. To quote an old and wise saying, "If you've met one Jesuit, you've met one Jesuit."
I am not a Jesuit, nor am I a cleric. I spent about 5 years under the spiritual direction of a Jesuit, 3 of those years in a weekly directed retreat in everyday life. The profound impact that the Society and the Excercises had upon my life, resulted in me, trying to deal with that impact in some way by sharing my view of Jesus Christ with others. My intention is to pull together Jesuitical and Catholic subjects that interest me. I was born on the feast day of St. Paul Miki, S.J.. I am the father of three small children and an infant, I am married to a great wife.