Toxin is produced by the bacteria in canned foods (typically indicated by swelling from the gases that the bacteria also emit). The toxin can't be easily destroyed, and definitely not with enough certainty that it won't paralyze you.

The botulinum toxin is the most potent toxin known in scientific literature, natural or synthetic, with a lethal dose of 1.3–2.1 ng/kg in humans.

That's 1.3 nanograms, i.e. 0.0000000013 grams. Firstly, your aeration would do absolutely nothing to the toxin, secondly even if it did, consider if you're sure enough that you didn't miss ~0.00000013 grams of it in there.

I also thought the bacteria was one of the ones that was around us all the time

That's true:

C. botulinum is a soil bacterium. The spores can survive in most environments and are very hard to kill. This bacteria is widely distributed in nature and can be assumed to be present on all food surfaces.

Idk how exactly anaerobic bacteria live and multiply, but at least when spores are dumped into a healthy adult stomach, the acid kills the bacteria. As evidenced by lots of people eating honey all the time.