https://www.google.com/imgres?imgurl=https%3A%2F%2Fi.stack.imgur.com%2FbbM09.png&imgrefurl=https%3A%2F%2Fearthscience.stackexchange.com%2Fquestions%2F14187%2Fcauses-of-fluctuations-in-atmospheric-oxygen-in-past-300-mya&docid=bzU7oSHUs_bHtM&tbnid=IBx4SwVh59a74M%3A&vet=10ahUKEwjG3rrgqNTgAhXmmOAKHYPaDaQQMwhBKAEwAQ..i&w=800&h=564&bih=803&biw=1658&q=oxygen%20levels%20over%20the%20course%20of%20earth&ved=0ahUKEwjG3rrgqNTgAhXmmOAKHYPaDaQQMwhBKAEwAQ&iact=mrc&uact=8
Look at how fast these oxygen peaks and valleys came, and that's just with completely unguided evolution. Ridiculous to think that we couldn't do it to mars on smaller timescales if we tried.