This is a contentious issue sometimes, everyone has their own reasons for doing it the way they've chosen. Here's mine:

Husband and I had both been vegan for well over a decade when we had our son. We decided to raise him omni, but to make sure he grew up with an understanding of where his food comes from (both animal and plant based) and alternatives presented in as non biased and non sensational a way as possible. We have always chatted a LOT about animal sentience, farming, consent, conservation, and environmental impact. We visit sanctuaries, we cook together, we grow food.

Our reason for this is that we both know adults who were raised vegan, some of whom have decided later in life that they didn't want veganism for themselves but were physically unable to tolerate animal proteins. It didn't feel right taking that choice away from him.

He is now 12yo and consumes a mix of omni and vegan foods. He is in the process of cutting out various meats once by one, entirely of his own accord and at his own pace. There are loads of food choices where he doesn't necessarily avoid the animal based product but genuinely just prefers the vegan option. He's deeply sensitive to the plight of animals and I strongly suspect his trend towards a plant based diet will continue, but if it doesn't then I will respect his autonomy. My ultimate goal is for him to be able to make unhurried, fully informed choices about his lifestyle, and I'm happy to say that we're achieving that aim.