Okaaayyyyyyy so I feel like this one will get me in trouble. BUTTTT I have a hard time agreeing with abortion. I'm not religious so I don't have some religious conviction against it. I just don't understand how someone can have the power to determine whether a baby lives or dies simply because they don't want it

I don't want to get into an argument I just want to hear how people justify it to see if it'll give me a different point of view on it.
PS: I'm not referring to extreme cases like rape or if the mother's life is at risk. Those ones I understand. I'm talking just about the people who get abortions simply because they got pregnant on accident and don't want a baby because it's "inconvenient". I just can't understand how someone could justify it and carry on with their life knowing they made the decision to have a human being killed. I really want to understand.