Explaining the importance of bees to an American

https://lemdro.id/post/30170857

I’m confused. Why cows would get extinct, but the chicken eggs for the bread will still exist?
Umm most white bread does not usually contain eggs; usually flour, water, yeast, oil, and salt. Wheat is apparently self pollinating.
The standard burger bun is brioche (not very nice brioche, granted, but they still call it that)