The case against eggs specifically isn't about killing a potential life,
Ethically It's more about the suffering of the hens in factory farms being exploited for their eggs their whole life only to be slaughtered afterwards.
Environmentally, it's about animal products in general being a less efficient source of calories than plants, and so contributing more to climate change overall.
Human health wise, its about a few things.
- Animal-human disease risk from animal agriculture in general (h1n1, avian flu, etc),
- Antibiotic overuse in animal agriculture leading to antibiotic resistant bacteria,
- Animal proteins in general being linked to certain types of cancer and heart disease.
If you just go vegetarian and cut out all meat you're still making a huge difference on the environmental and personal health side. I'd personally recommend going vegan long term and cutting out all animal protein (eggs and dairy too), but I don't think people have to go from omnivore to vegan in one go. Doing a sudden shift when someone isn't ready can actually make them give up on veganism because of a bad experience.
The key thing is to learn to cook for yourself, explore vegan recipes, and find yourself a good set of staple meals you enjoy with appropriate amounts of fiber, nutrients, and protein.
Sorry for the late response,
Personally I've always eaten a very healthy diet and lived an active lifestyle, almost no fast food/junk food, no sugary drinks, lots of fruit, veggies, and grains, etc.
So when I switched from omnivore to vegetarian, and eventually to vegan I honestly didn't notice much of a physical change at all. Still just as strong, I sleep well, eat well, and feel good overall. When I first cut out all animal protein I did experience a bit of a struggle mentally though, animal protein has been advertised as essential for strength and fitness so much so, that despite reading a bunch of studies and knowing about professional and successful vegan athletes, I was still scared I'd get weaker by going vegan lol.
Took a couple months to get over that mental block, but my strength and endurance never went down, it was all in my head. Ofc, some people say it changes their lives and others claim it makes them sick. I say do your research, learn how to cook a bunch of healthy and tasty vegan meals, then try it out for yourself. You can find studies and personal accounts to support basically any diet you want. Lots of bad/biased research gets published and funded and diet is a very emotional/personal thing for most ppl.
I don't miss eggs really, I sometimes make a tofu scramble as a kinda "scrambled egg" alternative. For baking ppl usually recommend making a "flax egg" as a replacement. At the end of the day though, I'm not trying to perfectly copy/replace all of the animal products I stopped eating.
Its a personal choice, and you just have to accept that you'll have to go without certain things. I don't miss meat, eggs, and dairy. I'm happy that i don't support a cruel system, I'm happy that in a small way I'm minimizing my environmental impact, and I'm happy with the knowledge that statistically at least, I'm at a much lower risk of heart disease and many types of cancer.
If you can't bring yourself to let go completely at least heavily minimize your animal protein consumption (replace with legumes and mushrooms), cut down on sugars, and avoid processed foods as much as possible. You can still have a positive impact on your health and environment.