Drama, mostly.
Seriously, the reason we keep it is that it’s written into the constitution. Now is not the time to use either method to amend, so we’re stuck with it.
There’s no reason for it to exist, though I can see its utility before communications were instant.
Here you go - scroll down below the code, links to add extension to each browser. When you click the captcha, there’s a new button (person with a checkmark) at bottom right of captcha popup. Hit that, and wait a second or two.
The extension will work its magic and make the captcha go away.
No more wondering whether I should pretend to be human, or a bot, or if I need to slow down clicking thru.