From my extensive research withdrawl actually is a better form a birth control and was even being brough up being used in teaching sex ed.
To be honest it's economics. Withdrawl is free(please don't reply back with a snide comment saying not when it got me pregnant etc.) Most medical practitioners have been brought with the idea pulling out is what gets you pregnant so use condoms and bc.
My gf is on birth control(the pill) but I pull out. For one birth control is 100% effective, condoms can break, precum has NOT been proven to be able to impregnate. Pulling out is a matter of control. I've spent alot of time playing with yourself, spanking the monkey and I know my penis... society would view that as wrong or something but i think it's unhealthy not to know your sexual parts. anyway the reason why pulling out fails is that it's not done right. PEOPLE ARE NOT EDUCATED ON IT and it's leads back to money... who profits if we don't buy birth control. Some doctors are brave enough to publish their studies on how pulling out is the MOST effective form of birth control if used properly.
So research it. I've been with my gf for 3 years now at the most fertile time of our lives and have sex about 3-4 times a week.