There are lots of people from wealthy backgrounds who'll slum it for a while. There's not usually a reason to doubt that. The thing to keep in mind is that voluntary/temporary poverty is very different from poverty you can't get out of with an embarrassing phone call.

I lived in relative poverty for a while when doing my first business, and while my parents were not particularly wealthy, knowing they provided an escape hatch took a lot of pressure off (living somewhere with a highly functional welfare system provided additional comfort). Things could have crashed and burned at any time, and I'd likely have been better off financially.