I assure you that there are many podscasts with very good content, everything depends on what you look for and also your tastes, for example I listen mainly podscasts about personal finance, businesses, economy and others, in addition to helping you learn, you can get new ideas from these podcasts, all advantages.
I completely believe in what you said. It's high time I started looking out for podcasts that's going to offer me better contents on personal finance, businesses, taxes and economy. They are going to be very help for me in a big way.