Oh please, if what you say is true every Betta that has been fed freeze dried has had constipation...absurd. Bettas should be getting a mixed diet of pellets and freeze dried foods regardless. My Bettas has NEVER had constipation and I have NEVER fed them frozen foods. Frozen foods can also contain parasites.
I didn’t say it was guaranteed. I said it was more likely. You can also help this by feeding them peas.
If you research it you will see that I’m not just making these things up.
You can eat hamburgers everyday and not get high blood pressure; it doesn’t mean there isn’t an increased chance that it will happen.
If you buy hakari frozen blood worms they are sterilized, so no worry of parasites. Most professional betta breeders use frozen blood worms since they are extremely nutritious for the fish.
I understand if you disagree but no need to be angry. Everyone has their own experience.