That's a bit of a difference in comparison.
A better comparison would be "does watching common heterosexual porn make common heterosexual men more interested in performing common heterosexual sexual acts?" or "does viewing pornography long term satiate a mans sex drive?” or "does consumption of nonconsensual pornography correlate to an increase in nonconsensual sex acts?"

Comparing "viewing child sexual content might lead it engaging in sexual acts with children" to "viewing sexual activity with women might lead to rape" is disingenuous and apples to oranges.

https://wchh.onlinelibrary.wiley.com/doi/full/10.1002/tre.791

a review of 19 studies published between 2013 and 2018 found an association between online porn use and earlier sexual debut, engaging with occasional and/or multiple partners, emulating risky sexual behaviours, assimilating distorted gender roles, dysfunctional body perception, aggression, anxiety, depression, and compulsive porn use.24 Another study has shown that compulsive use of sexually explicit internet material by adolescent boys is more likely in those with lower self-esteem, depressive feeling and excessive sexual interest.1

some porn use in adult men may have a positive impact by increasing libido and desire for a real-life partner, relieving sexual boredom, and improving sexual satisfaction by providing inspiration for real sex.7

As for child porn, it's not a given that there's no relationship between consumption and abusing children. There are studies that indicate both outcomes, and are made much more complicated by one of both activities being extremely illegal and socially stigmatized making accurate tracking difficult.
It's difficult to justify the notion that "most pedophiles never offend" when it can be difficult to identify both pedophiles and abuse.

https://pubmed.ncbi.nlm.nih.gov/21088873/ for example. It looks at people arrested for possession of child pornography. Within six years, 6% were charged with a child contact crime. Likewise, you can find research with a differing conclusion

Point being, you can't just hand wave the potential for a link away on the grounds that porn doesn't cause rape amongst typical heterosexual men. There's too many factors making the statistics difficult to gather.