I say all that to ask, why do people believe that higher education is a sign of trouble ahead for the WT? Is it because they’re going against official stance on education? If they still hold up the party line (no birthdays, pride in being a JW, even field service), then what is the excitement about? It’s a great personal achievement for sure, but in my experience, it doesn’t mean they’re moving from the WT. I’ll add that this was all within the last 10 years in case that makes a difference to your analysis.
In many cases, a good education will not wake someone up to the fact that Watchtower is a doomsday cult. But the statistics suggest those will be the minority as the level of good education increases.
First of all, properly educated people learn that man really did evolve from lower life forms, and they learn that the earth could not have had a global flood thousands of years ago, let alone that a small group survived that. Going beyond learning that the Bible is a fairytale, properly educated people learn to question everything. EVERYTHING. The only stronghold Watchtower has over that is lifelong training to tell it's members to question everything EXCEPT THEM. So smug JW's getting an education will fool themselves into believing that they do question everything, and they will allow God to be the exception and they will allow Watchtower to be God's mouthpiece.
The reason that often doesn't hold up is because most JW's are not smug, many who get an education value the education over strict obedience to the letter of Watchtower's commands, and education teaches them that there exists flawed thinking. When members discover that flawed thinking, they see some of it within the pages of Watchtower magazines.
Philosophy can destroy a faithful JW also. Philosophy will help them understand that if God wants to aid strangers to the "truth," God can do better than sending goofy people to their door on Saturday morning. And philosophy will further teach them that God should not see people as inherently bad because they don't become JW's. Philosophy is a huge part of a proper education.