Hypothetical situation: Let my child choose between mortgage vs student loans

So I put $5k in to a portfolio for my daughter on her second birthday. I plan to manage it for her and use it as a tool to teach her financial literacy as she grows up. It is all in my name and I plan on maintaining primary control till she is in her 30s and can be trusted not to squander it.

My father in law put $18k in to a 529 for her when she was born, so this portfolio was never intended as a college fund. It is to teach her about compounding interest and the difference between money and wealth.

I recently came across an article describing a college educated child being angry at their parents for helping no college child with Mortgage down payment. DP was similar sum to tuition. Tuition did not cover full expense of college, but DP did not cover full cost of Mortgage.

Who do u guys think made the better financial decision? Does this seem like the parents were fair to their children? If my daughter did not have the 529, would you suggest I offer her this choice at that time?