...the canning process involves just that to sterilize/cook the food inside and the plastic should stand up to that amount of heat.
Unfortunately, "stand up to" is not the same as "will not release any BPA into food".
Any canned food already has BPA in it that leaches from the can liner. Re-heating the food by heating the can is just adding more BPA, but how much? Who knows. So, if you're worried about BPA, it's already in the food before you even re-heat that can.
We've had this BPA discussion many times. If you're into old school toxicology, BPA should not be able to harm us in the quantities involved. If you're more open minded about the hormonal action of BPA and understand that hormones operate at miniscule concentrations, you can't dismiss that incredibly tiny amounts of BPA can affect cells in the lab or even in animals and there are plenty of studies that show that. We do not have a regulatory framework in this country that can really handle this new alternative class of toxins.
Humans already screw up their health in so many other ways and we live a long time, so it's hard to study the effect directly in people so I'm not sure if we'll ever have definitive evidence just from human studies. Actually, you could say the same thing about tobacco. It took a really long time to conclude that smoking harms us but little of the evidence is the kind of direct human evidence that your average person seem to expect from people warning us of chemicals like BPA. I think everyone here would agree that smoking is bad for your health? A couple decades from now, we
may all think it's a given that BPA is harmful and shouldn't be used in food packaging.
I personally don't think about BPA much, but that's mostly out of practicality. It's
everywhere. I do think that it, and many other chemicals that we are exposed to daily like pthalates, can certainly be affecting our health in ways that we're just not aware of at the moment.