You've got a 0.45% chance of becoming a professor, but don't worry, you've got the chance to be one of the 47% of early career researchers and 3.5 % of permanent research staff before you realise this. Good luck.
https://royalsociety.org/~/media/Royal_Society_Content/policy/publications/2010/4294970126.pdf
Actually this info is for Science, but you get the picture. It's highly unlikely, but a lot of us still try it.