I've worked full time since dd was a baby. I've always been fortunate enough to have a very flexible schedule that can fit around her needs. I genuinely feel no guilt about working, never have. There is simply nothing to feel guilty about.
I spend loads of time with dd and we have a great relationship. In fact, I'd say that she is much closer to me than she is to her dad, who was a sahp for a while when she was younger, and still works fewer hours than me overall, so I don't think working has had a negative impact.
Work is what enables me to put food on the table and a roof over our heads. It pays for dd's clothes, books, hobbies and so on. Providing for dd is all part of my duty as a parent.
As a child, I used to wish that my sahm would get a job, because she was utterly miserable at home. I know that I'm a much better parent if I'm happy and fulfilled in my own life, and work helps with that because it gives me a sense of identity, purpose and achievement.
If others feel that it's better for themselves and their families to stay at home, I have no issue with that, but for me, working is the right choice. My dd is a fantastic child, growing into an amazing human being of whom I am tremendously proud, so I figure I must be doing a good enough job as a parent. So no guilt, because there is nothing to feel guilty about.