The goal is not to make the content usable. The goal is to get the traffic.
When advertising alone is the "business model", e.g., not the value of the "content", then even Cloudflare is going to try to protect it (the advertising, not the content). Anything to get www users to turn on Javascript so the surveillance capitalism can proceed. Hence all the "challenges" to frustrate and filter out software thatis not advertising-friendly, e.g., graphical.
Cloudflare's ruminations on user-agent strings are perplexing. It has been an expectation that the user-agent HTTP header will be spoofed since the earliest web browsers. The user-agent header is a joke.
This is from circa 1993, the year the www was opened to public access:
https://raw.githubusercontent.com/alandipert/ncsa-mosaic/mas...
Cloudflare's "bot protections" are not to ensure human use of a website but to ensure use of specific software to access a website. Software that facilitates data collection and advertising services. For example, advertising-sponsored browsers. Any other software is labeled "bot". It does not matter if a human is operating it.