I 100% agree but it's not like captcha are a complicated things or that we didn't all more or less switch to it from something else.
I can say for my current needs right now that if created a non-subscriber posting content page tomorrow I would use a captcha because it removes enough bot to be worth it, and I would go with recaptcha because I find it the better one for end users (I as a user prefer to see it on websites compared to other solution).
Not saying this is the case here, but cargo culting does exist in tech, so this is quite a weak argument in my opinion.