My headcanon (and actually reading the wiki, it is pretty much canon) is that none of this is actually true, but just stories past down over generations.
We hear of the whole being digested over 1000 years thing from Jabba (translated by C-3PO) while he's threatening them with execution, so it's not exactly reliable info.
In fact evidence actually points to the contrary, from the wiki:
During Boba Fett's escape, he spotted the body of a stormtrooper that was likely part of a search party years before. Despite this, the stomach acid of the sarlacc was still potent enough to have dissolved holes in the stormtrooper's armor and scar Boba Fett after only hours of exposure.
Or sold to advertisers...
Or your insurance company...
Or law enforcement...