I don't think this community agrees with you that web scraping is inherently unethical.
In fact I think many (most?) in this community would argue that web scraping is an almost fundamental feature of the web itself, and that attempts at preventing it are more unethical than scraping.
What's wrong with proxy rotation? Big Tech attempts to prevent any scraping of their content whatsoever. In the context of that web, proxy rotation is table stakes.
In fact I think many (most?) in this community would argue that web scraping is an almost fundamental feature of the web itself, and that attempts at preventing it are more unethical than scraping.