Why is debt good? (Rich dad poor dad)

I’ve seen the author say debt is good plenty of times and might pick up his book. Anybody who read it or know the specifics?

In my country I’d have at the least 3% interest rates on a house loan and the only time I’d consider paying off my mortgage more than required is if it’s over 5% since the stock market average is higher.
Am I missing something? It’s still one of the most popular economic books out there.