I’m gonna get in trouble for saying this, and the difference is obvious, but not all acts of Prishus means more Kedushah and Taharah (and this extreme example is to prove the point, not to compare Ger to any of these people). The Tzedukim/Essenes/other sects were more “Machmir” than Chazal on Tumah and Taharah issues (see the Mishnayos in Yadayim). That doesn’t at all make them more Kadosh or Tahor than the rest of K’lal Yisroel who followed Chazal. Ad’raba.
And this discussion was not to bash Ger or anyone. It was to dispute the premise stated by a poster that one who doesn’t hold hands with his wife is inherently more Kadosh and Tahor than one who does.