Client side captchas are obfuscated code, so the bar of “the user can debug the problem and fix it themselves” is pretty high. Also, reCaptcha definitely engag

Client side captchas are obfuscated code, so the bar of “the user can debug the problem and fix it themselves” is pretty high. Also, reCaptcha definitely engages in both hell-banning and allows incorrect answers to pass the test. I assume the logic for those things is mostly server side.