First...Is DVC for everyone...NO!
Everybody has different reasons for buying or not buying. You must be happy in your own mind with how you spend your money.
My DW and I decided that we wanted to vacation every year and living in Minnesota made Florida look pretty good.
The one thing I would like to stress (that other also have) is that DVC is NOT an investment like stocks, 401K, etc. We viewed it as a pre-paid vacation plan, which protects us from future hotel price increases.
I know you could invest the same amount in other things and make money or interest, but I would argue that if you vacation every year, you are spending the money anyway.
Look into the features, understand how it works, look at your own vacation habits, and make your decision on how your family will use it.
It works for a lot of people and doesn't work for others.
Good Luck,