I think you may be understamating the concept of ex nihilo creation and the bounds of what science can answer. I am reasonably confident that science cannot answer some question. I'd like to think I know because I am a scientist.
There's more obvious questions I don't think science can answer like the hard problem of conciousness which was originally posited by David Chalmers. It's about answering the question of why any physical matter produces conciousness rather then unconsciousness. More simply: why do atoms arranged 'brain-wise' produce conciousness. You may think we have made progress on this question but we actually haven't at all.
This video covers it in laymans terms very well.
Answering why there is anything rather then nothing is in my opinion equally difficult to answer. People may see God as a convenient answer to this question but I think we need to really think about what God even is. God doesnt need to be Abrahamic in nature. Many people seem more accepting of a God that is deistic in nature as opposed to the personal Abrahamic God.
I wish more people would seriously engage with philosophy of theology because many would see that arguments for theism are just as rational and reasonable as atheism.