hahahah to this day i don't crack an egg without thinking about that... friggin nasty.... all gooey and kinda of furry, and you could see blood.
I've never cracked an egg that had an embryo in it. I'm sure it would not be pleasant. But most store bought eggs are produced at factory farms where the chickens live in utterly horrific, inhumane conditions. If you ever visit one of those farms, you'll probably never eat any eggs ever again.
The egg with small chick in, is actually a very popular street food in the Philippines, called, Balut. It's cooked and it tastes like chicken/duck, although is sad and gross to look at. It's not really a bad thing to see nature doing its course with food. You should worry about the eggs that don't turn into chicks, the flour that never makes larves and butterflies... Regarding price/quality, there is some speculation on the value items, but when the ingredient itself is expensive, price can make a difference on quality. There is level that is too low, when you consider ingredient and production costs.
One of my first real jobs was in Maritime industry and in an oversight capacity had experience of seeing unrefined sugar down in rusted out ship holds. The rust was the least of "ingredients" that might turn you off eating anything with sugar in it. Think ships crew and stevedores down in the holds (just 4 sided square boxes) umm taking a bathroom break, rats stuff, etc. But don't fret, of course it is all cleaned, bleached and refined once it gets to Domino Sugar etc.
Since mayonnaise is all the rage on ET today, I decided to make some. Procedure: Add one cup of sunflower oil to a container. Do not use olive oil, it turns bitter when blended. Good quality rapeseed oil is another option. Crack in 2 raw eggs. Insert handheld blender to the bottom of the container and let it rip for about 15-20 seconds. Don't move the hand of the blender much or you can ruin the process. Add 5 tablespoons of fresh lemon juice, 2 tablespoons of American mustard, a small pinch of salt. Blend briefly for about 6-7 seconds, just enough that it's all mixed in. Optionally include a bunch of fresh basil and cilantro or even dill into the last step to make the final result tastier and most importantly, fancier. If care was taken, you'd have mayonnaise with good consistency. If it's too liquid, you screwed up, better luck next time.