They're not tasked with anything. They choose to sell a bot detection and mitigation platform as a product, and that's a hard business to be in. If they think they can do it, great. If they can't, they shouldn't try.
Why not place the blame on the people who are configuring Cloudflare to behave in this way?
I'm a happy Cloudflare Enterprise customer, and our DDoS settings are "Off", we don't present captchas to end users, we don't block any traffic, and we've disabled all of Cloudflare's managed rulesets.
It's very possible to use Cloudflare with all of the security features switched off. The features causing the author's issues are features that can be disabled by the site owner. Cloudflare has power over what they recommend as the default settings, but ultimately it's up to the site owner to choose how to configure Cloudflare for their site.
I think there could be a healthy debate around Cloudflare's default account settings, but I'm surprised by the number of people here dismissing the fact (or maybe not aware of the fact?) that all of these are features that can be turned off. The owner of the site chose to keep bot protection, visitor verification and related features turned on.
Sane defaults. Of course everyone would turn DDoS protection on.
I'm wondering if it's related to Cloudflare's new/updated Bots features, especially the "Super Bot Fight Mode" feature -- which I believe gets a default setting that is super strict.
As others have mentioned, saner defaults might help, but I guess they want to error on the side of "more secure" vs a less secure default.
Blocking all crawlers except Google bot is itself a problem.
There should not be any bot protection, only abuse (e.g. DDOS) protection. Block disruptive behaviors, not fingerprints.