> I get possibly being creeped out that Google knows you prefer Pepsi over Coke and that you recently purchased an adult toy or whatever

Frankly, if I preferred Pepsi over Coke, I'd rather get ads (which sometimes include discounts/coupons) for Pepsi than for Coke.

Similarly, if I bought an adult toy, I'd rather get ads for similar adult toys than ads for <whatever the hell else the option for that slot would be>.

I'm definitely pro-privacy, but it's got nothing to do with "so I can't be shown relevant ads".