All captchas are easy to crack because there are services that employ workers to solve captchas. You can buy packages of solves and they guarantee a specific accuracy rate and solve time. You submit via an API and get a result back in a few seconds. The result may be a string or it may include a mapping of how the user interacted with the app (which your client then emulates to fool the captcha app that it is receiving human input).

It's just another electronic service provided by workers in low wage countries.

Captchas mitigate the issue slightly but they're not a magic solution to bots. They can be the difference between the instance gaining 1,000 bot accounts in a day instead of 10,000,000 however.