Thank you for your candor! My tamest, most bonded budgies love potato chips, Popsicles, beer, soda, cheese, bread, meat, and grains of salt. I don't GIVE them these things (except a taste of a popsicle) but I don't try that hard to stop them when they steal a few bites of our food. My budgies all seem very healthy.
I don't understand why all these things are so bad for our birds, dogs and cats but we spend our entire (much longer) lives eating them daily without any apparent harm. Seagulls and pigeons that live near humans eat a lot of discarded human food and "seem to thrive" on it. It can't be an ideal diet for any living creature but "the authorities" at least in the US, do not seem very concern about the effect on our health.