Hi laszlo, 

We can't turn off the captcha for when you login. A little secret of mine, is to hold down the "I am not a robot" button for 1 second, and it usually means that I skip the "Select all the store fronts" kind of question. 

The difference between captcha and MFA, is that captcha stops spam attacks, where MFA is for your personal security - making sure you are, who you say you are. . 

Is that helpful?