Hey all!
After a dozen of reCAPTCHAs I filled again, I take the opportunity to propose a change in the CAPTCHA system.
To me, that should be considered as "Bug" (as for the tag I chose) since it is not an expected result the CAPTCHA itself discourages/prevents legitimate use of the website.
Thanks for your time.

Sorry the reCAPTCHA is annoying, but it’s necessary for the security of the accounts on our system. If you add two factor auth to your account then a captcha will never appear when logging into your account. Hope that helps.

reCaptcha is spyware. Using it expresses your support of all its privacy violations.