There's still a massive sample bias problem. Financially responsible, employed MDs & JDs frequently pay off their student loans by ~4-5 years into their practice. That means that a MD/DDS/JD using a loan refinancing platform is probably just starting their career (likely, given the ages in this report) or has no clue how to manage their money (also likely, given the sample bias Animats pointed out).
This age bias doesn't necessarily extend to other professions, as someone with a bachelors or associates in a non-STEM, non-professional field might be paying off (and refinancing) their loans for decades.
The data here is interesting, but because of these biases, you have to take it with a grain of salt; it probably doesn't reflect the financial picture of the population at large.
It's typical - conservative even - for lawyers who end up going into BigLaw. $160K starting salary will let you pay off even a couple hundred grand in loans in just a couple years.
This admittedly is only about 20-30% of law school graduates, but in a survey of net worth, dropping the 20-30% of data points that are most likely to have high net worth will skew your average significantly.
This age bias doesn't necessarily extend to other professions, as someone with a bachelors or associates in a non-STEM, non-professional field might be paying off (and refinancing) their loans for decades.
The data here is interesting, but because of these biases, you have to take it with a grain of salt; it probably doesn't reflect the financial picture of the population at large.