Sure, even if it's a merely a fraction of the prison population, the sheer human cost of those remaining in prison is incalculable. Still, from a public policy point of view at some point it sort of becomes indistinguishable from the background population of those unjustly incarcerated for myriad other reasons, and trotting out rare examples of long-term marijuana possession prisoners confuses the debate.

We're like 15 years into marijuana decriminalization--actual decriminalization at the state and even Federal level, not simple advocacy. It became a mostly bipartisan endeavor, at least on the national level since at least 2015 when Paul Ryan became Speaker. Though for various reasons most of the GOP remain non-committal, and will only tacitly support passive decriminalization.

Nonetheless, that's at least 15 years of slowly emptying our prisons of not only marijuana offenders, but drug offenders generally. The state of affairs today is nothing like the numbers that advocates were throwing around 15 years ago (and what most people still believe is the case), and even then they were exaggerated. There's still a ton more that needs to be done, and some reforms even need to be walked back or reverted because it turns out decriminalization alone exposes some serious problems and deficiencies elsewhere in the system. But if everybody's empathy is focused on the de minimis incarceration problem it's difficult to regroup and shift efforts.