THCA spontaneously, partially, and SLOWLY decarboxylates (BTW- not "decarbonates" - totally different chemistry. CO2 vs COOH) on exposure to light, room temp, and long-term storage. THCA also binds VERY WEAKLY to CB1R and CB2R. Yes, you might feel something by eating raw material - you lightweights! ???? As Yoda says, the placebo effect is strong in this one.
Try these articles. If you can't read these, you have no business commenting on cannabinoid chemistry. Takeaway message: MINOR binding of THCA-A to receptors, with MINOR effects. THCA is stored in fatty tissues and takes MONTHS to build up to appreciable levels. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510775/ https://www.nature.com/articles/s41598-020-77175-y