mamadeb

"Palter" doesn't mean "permitted", it means "baker". "Pas palter", which is permitted, is bread produced for sale at a commercial bakery. Because buying a commercial product is less likely to lead to personal intimacy than is eating something cooked in someone's home, and because bread is a necessity of life, pas palter was permitted, though when pas yisroel (bread baked by a Jew) is available it is to be preferred. The permission does not extend to non-bread items, or to bread baked in a private home.