I thought about this, too, but I see alot of these jobs with Python requirements being a one-way street, so to speak. A physicist or aerospace engineer might have more chances to work with Python in their jobs, but a good Python developer would have a hard time trying to get a job where the primary skillset requires a degree in Aerospace Engineering.

In general, most of the jobs in Python are side-effects of the field they're used in and not based on being a good Python developer.

I'm sure there are exceptions, but in my localized job searches, Python isn't seen as the primary skillset, merely a 'nice to have' one.