Even if I won the lottery and never needed to work again, my child wouldn't get 100% of me because what would be left for me?
Life isn't a finite amount of anything that gets split into percentages, if you have a second child you don't abandon your first one for 50% of the time and give them 50% less love.
You make it work, and find ways to ensure that you can focus on work when you're there and focus on your child when they need you and focus on yourself when you need that.
DD has been in full time nursery since she was was 9months, then school, she's now 9yo. She feels loved, she's confident, bright, well adjusted, happy, occasionally annoying, generally well behaved, sociable, starting to show signs of hormonal moodiness (which is fun).
She hasn't been damaged by me working, she has benefitted from our financial stability and she's benefitted from my feeling of self worth, confidence and achievement which in part is obtained by progressing in my career.