Install captcha on site forms (http://sedmoe.com)

Do you need to understand from which form spam pours and install a captcha, or is it better to install it on all forms?
v3: A relatively new and progressive method of protection, since in the new version reCAPTCHA itself collects the context not only of filling out the feedback form, but of the entire use of the site, that is, if the user goes to the site and immediately goes to the feedback form - which he fills out automatically, reCAPTCHA v3 will consider it suspicious and will not allow you to send the completed form, and for an ordinary user, even using autofill, it will only be indicated by a small icon on the form - ( http://itcscr.ru/mka/L2024-09-10_154935c.png )
Cases of bypassing the reCAPTCHA v3 system are less common, and real cases of SPAM on sites with the third version of reCAPTCHA installed are also rarer.