The monetary penalty was $5, which translates to $150 in adjusted 2020 dollars. Quite the jump from there to 'remove all ability for gainful employment in perpetuity'.

VivaFrei podcast has recently claimed that the Jacobson decision was the sole basis for the Buck v Bell decision, which instituted the eugenics program.

https://en.wikipedia.org/wiki/Jacobson_v._Massachusetts

https://en.wikipedia.org/wiki/Buck_v._Bell

https://www.youtube.com/watch?v=QuN9YhIhQ7Q&t=2070s