[Avodah] eating for brachot rather than brachot for eating?

[Alexander Seinfeld]

They did not eat them because they only ate healthy food.
Eating for berachot began when Jews stopped paying attention to the
mitzvah of shmrat haguf (staying healthy).
My guess is mid-20th Century when unhealthy calories became dirt cheap.
Alexander Seinfeld

>Did bnai yeshiva not eat granola bars in the time of Moshe Rabbeinu due
>to safeik brachot? When did the approach of eating for brachot rather
>than brachot for eating take off? Why?
>KT
>Joel Rich