I can understand and appreciate their concerns but I have noticed that it does present the JW with tough choices. The JW couple we saw at the soccer practice only did it for the first season. They did not return on the second season. My wife said more than once of these people that they "Put God First" and that they never practiced "on meeting nights" or when they "could be out in field service" (or as WTWizard puts it 'Field circus').
The whole 'unbaptized' exception is something I could not help but note in examining some of the WT teachings. The elder who my wife and I do our "Bible Study" with has a college degree in pharmacy. When attending one of their assemblies, I noted that the witnesses discourage pursuing a college education. Since my wife is in college, this must have bothered her because she started talking about quitting college so that she can "teach for Jehovah." When I probed her about the change of heart, she indicated that she is tired of pursuing the degree and feels she should be able to teach (pre-school) without it. Then she indicated that she feels that Jehovah would prefer that she "puts Kingdom interest first."
I said, "I see your point but does that mean no one should get any college education? What about the elder who you study with? Doesn't he have a degree?"
She replied, "Yes, but he got it before he was baptized." I replied, "Well isn't that convenient. Take the good things from the 'world' while you are not baptized, then get baptized and spend the rest of your years 'serving Jehovah.'" Sounds a little hypocritical to me.