Pediatrician Pushing CIO and I just don’t agree

This morning my LO and I went in for his 6 month appointment. He’s beautiful and healthy - thriving!! When it came to talking about sleep I said he goes down around 8pm, and can stay asleep until 4-5am and my husband and I get up a few times to pop his pacifier back in but he falls back asleep right away. She said that if we sleep trained him and let him CIO we would get more hours of sleep from not waking up to help him and that he’d “figure out how to sleep” on his own when he woke up. While yes, sure - I’d get more sleep but at the detriment of letting my baby cry and cry. And I just can’t and don’t agree with that. I’m feeling like I’m doing something wrong and just need some reassurance that it’s okay not to sleep train.