Not true. There are schools which will consider nationally accredited degrees for admissions into graduate schools. Even the University of Chicago will consider them.
However, it's potential utilization is much, much more diminished compared to a no-name state school.
This might change when (if) they acquire regional accreditation, but they've only just started the process. Thus, it could take upwards of 5 years.
The idea that UoPeople is some kind of academic dead-end is simply not accurate. It's not going to get as far as a degree from a no-name state uni on its own, but it can definitely be leveraged to further one's goals.