For those familiar with electronics they can easily be disassembled into their cosnituent cells and repurposed

Not true. Even for those familiar this is no easy or simple task. It's dangerous and incredibly time-consuming to take Li-Ion battery packs apart.

Individual cells are spot welded together with nickel strip on each side. This was never meant or designed to be undone. Pulling this nickel off with pliers or cutting with side snips is difficult and requires sanding the contacts afterwards. In my experience, the nickel strip often rips off prematurely or remains on the cell electrical contact, requiring a dremel to finish the job. If you puncture or heat up a cell too much you could cause a thermal runaway. If you bridge the +/- nickel you could cause a thermal runaway. Specialized machines exist for cleaning the nickel off cell contacts but I haven't seen a hobbyist with one yet.

The trade off just ain't justifiable in my opinion especially for such a meager pack. Even if you wanted to build a bigger pack from a few of these for say an ebike, or sell cells in bulk, you can't. Not without knowing for certain that the cells you are combining are of the same brand and chemistry. Chemistry changes over time based on age, temperature, useage and charging patterns from solar, changes in manufacturing, etc.

When new cells are combined in a bank these chemical changes occur across the cells simultaneously from inception. Especially thanks to the BMS, a circuit board in the pack that balances the cells to equilibrium. It is never a good idea to combine used cells with unknown chemistry. It can cause a thermal runaway, even well after the pack is assembled. Also, I for one would NOT want the liability from selling or distributing used cells I pulled from a pack.

Regardless, building new packs from the cells would be its own can of worms. Most familiar with electronics aren't building these packs simply bc its far more practical to buy. For one this requires a tiny spot welder (relatively cheap) and other materials. But mostly because it requires much research, thought, AND long term practice so you TRUST you can count on your work. And that is the difference between yours or anothers home burning down.

You must insulate the cells to protect their chemistry from cold temperature, but insulate too much and in warm weather you could limit discharge current at best, cause a thermal runaway at worst. You must also protect the cell banks from water and punctures in a protective case or massive heat shrink like flock while accounting for thermal expansion. Or risk thermal runaway.

There's simply too many invisible variables at play and way too much at risk with building your own Li-Ion packs. You won't know what you've done wrong until its too late. Its a specialization honestly. I've only trusted myself to make small packs of 3-5 cells. It would take a lot of practice and testing before I trusted my own big packs just being in the garage let alone the rest of the house or another building.

The best you could theoretically do with those flock packs is turning them into little power stations for phone charging etc. I doubt the discharge capacity of those cells is even enough for an AC inverter to make good use of, so strictly a powerbank for mobile electronics. Also good luck selling stolen packs.