I think it's saying there's more microplastics in unhealthy than healthy tissue is all, your interpretation is technically possible but phrasing it that way would be so misleading as to basically be lying.
The reason more microplastics in unhealthy tissue doesn't necessarily mean microplastics cause unhealthy tissue is that unhealthy tissue would be worse at removing substances irrespective of whether the substances cause the harm.
Apparently if you have a 11th gen or older Kindle device, the KFX Input plugin and the latest DeDRM will allow you to pull books off it and crack the DRM. This worked for me with my 10th gen Kindle, after the removal of the web download feature.
WMF has had nothing to do with Wikia/Fandom for years (apparently they shared some hosting costs back in 2009). Jimmy Wales also hasn't exerted control over Wikipedia policy in a long time, and as of this year no longer even nominally has the right to overrule ArbCom.
So at the very least that's not actively motivating the continued state of the notability guidelines, though I don't know if it's possible the original motivation was as you suggest.