To be clear - even in that world, not having WEI would make you much more suspicious than a ‘normal’ user, so you’re effectively describing every Firefox and/or Linux (etc) user seeing captchas all the damn time. If Cloudflare used this as a signal, that’d be a captcha for 20% of websites.

Try using Tor today and see how inconvenient the web becomes. Just ‘not blocked’ doesn’t mean you get a reasonable experience.

The only healthy route for the web is fair access and free competition between clients. WEI sets that on fire.