You do. I think these loans are generally used for short term liquidity. For example if you want to buy a new house before selling your old one. You'd get a loan against your assets, buy the home with the loan proceeds, sell your old home and pay off the loan.

If your assets are growing faster than the interest it would also be possible to payoff the loan with a new (larger) loan, so you are still kicking the can down the road but eventually you would die and never need to pay the taxes while you were alive. I doubt this is done that often in practice, but who knows.