You're repeating a persistent myth.

Eating raw cannabis will absolutely get you high, and heating it doesn't noticeably affect the potency.

"Decarboxylation" or the removal of a carboxyl group, where it's usually released as CO2, is a common reaction in chemistry, and it doesn't tend to require a lot of activation energy. Every amino acid is decarboxylated after you consume it. Carbonic acid in soda decarboxylates itself at standard atmospheric temperature.

And in the case of your stomach, the HCl will decarboxylate the weed you eat just fine.