Yes, that’s how it works. Now let’s draw ourselves a graph:

The x-axis is number of men you know. The y-axis is chance you know a rapist, based on 6% of people being rapists. There were about 50-ish men at my wedding and I work with at least another 50 more who I know by name.
So yeah, the odds I know a rapist are pretty damn good.
As for “rape culture” absolving rapists, let me ask you a question. Suppose you polled 100 people who said “rape culture” was a real thing and 100 who said “rape culture” was not a real thing, and asked each if 6 months was a sufficient sentence for Brock Turner. Do you think that belief in rape culture would be positively or negatively correlated with desire to see harsher sentences for a rapist?
It would be easy see that usage of the term “rape culture” correlates with expectation of more individual responsibility for rapists. The idea that “rape culture” absolves rapists is empirically false.