It’s been tried, with some success. Pretty sure I’ve seen a post here on HN from someone that DIy’d it end to end.

But it’s also something that’s not responsible to shortcut. Shifting teeth around too fast can result in permanent root damage and even loss of teeth. There was a whole cottage industry in the US for a while focused on under cutting Invisalign with a reverse-engineered product, but they often moved on accelerated treatment timelines that caused a not-insignificant amount of harm to patients, and cut corners on intake (DIY at home mold kits) that also contributed to problems. Pretty sure all of the companies doing this are basically dead now.

Also no one has mentioned many mouths needed some teeth shaving to re-align. You are NOT doing that at home.

Also who’s attaching the attachments (I had 13 at first) to the teeth to help the aligners grab hold?