Isn't that the point of recycling? To reuse the reusable materials like plastic?

If salvaging 100% of the materials that make up something is the only way to "properly" recycle, we are not recycling anything properly. Some components are not recyclable.

I won't speculate about whether the plastic on the board is recyclable, or ecological to recycle. I don't know. This is what I'm asking.

Not burning all the ICs and all the other components that still work perfectly fine would be a good start imo.

That would fall under Reuse rather than Recycle. Reduce, Reuse and Recycle are in the order of best to worst. Recycling is the last ditch effort to not completely waste something. It's always going to feel like a half measure, because it is.

I would say reusing a "disposable" vape would be refilling it and recharging or exchanging the battery, not salvaging it for parts.

To do WHAT with? Catalog and categorize the millions of random penny-priced ICs that MIGHT be usable for something else?

That there is no way to recycle electronics economically is the reason that they are not recycled. I don't claim otherwise.