You'll have to explain to me how not compensating someone for their work has been ethical since the 90s.

Opening my computer up to Malware is not worth the fraction of a penny that the person who did the work will receive from my click.

https://www.statista.com/chart/29626/ads-blocked-removed-by-google-by-enforced-policy/

Deceptive Ads & Malware Make Up Bulk of Blocked Google Ads

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5.2 Billion Bad Ads removed in 2022. 1.8 Billion more than in 2021.

Were they removed? Yes. Did they show up prior to removal to real human beings? Also yes.

https://www.comparitech.com/blog/information-security/malvertising-statistics/

in the first half of 2023 alone, with phishing URLs leading the charge with a 140.7% increase.

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Security Gladiators reports that on average, of every 100 ads that are published, at least 1 contains malicious code.

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A report by Confiant found that in Q3 of 2021, 1 of every 108 ad impressions was highly disruptive or dangerous.

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Safety Detectives’ malvertising report showed that the global cost of malware was $500 billion per year in 2015, but in 2021 that figure cost an average of $500 billion per month.