Ryzens are a dynamic cpu. Intels are static. With an intel it's all 1 speed until it overheats, throttles back or shuts down. Ryzens are different. At 60°C they'll start dropping VID and click speeds slightly on individual cores, that maintains the best level of performance and temps. As temps get higher, reaching towards 80ish°C, more cores will lower speeds and voltage.
So if you normally get 4.0GHz across most of the cores at 70°C, and then kick in some uber cooling or airflow that would drop the temps to 65°C, a Ryzen says 'hey, I've got room to improve' and will kick the cores speeds right back up to 4.2GHz and temps back to 70°.
So will extra fans help temps? Unknown if you are reaching best speeds/max voltages, then the extra airflow will stand a chance to lower temps. If your cores are lowered because of the temp, the extra airflow might provide enough to allow further performance, but not change the temps.