No, the argument is that there's plenty to learn, and it's all very interesting, but it doesn't stand up against people's very real needs here on Earth. I'm about the biggest fan of space you'll find, but even I, sadly, find the ethical calculus unassailable. Manned spaceflight won't accrue material benefits for ten generations or much more, and meanwhile human beings are dying of treatable or curable diseases, suffering under poverty, and living without access to clean water.

This spoken-word work from 1970 conveys the sentiment well: https://www.youtube.com/watch?v=goh2x_G0ct4