HaTorah HuAvodha - hey hayediah is exclusive. I'm lo brisi Torah she bal peh. The world DOESN'T stand on the existance of Torah scroll or its spiritual entity. Rather it's living existance by the mouths (chaim l'motzaihem bapeh) of its learners.
HuAvodah is exclusive even though all mitzvos are avodas Hashem & acc. to sefer chareidim, every mitzvah even demands avodah shebalev, the world stands specifically on HaAvodah sheb'lev of korbanos/tefilah.
Gemilus chassadim doesn't seem to be exclusive of anything...
Chassam sofer notes the mention of Shimon hatzadik being from the anshei knesses hagedolah. They restored 'attarah l'yoshna' with hagadol hagibor v'hanora. The C.S. Explains these 3 titles as refferences to the three pillars Chessed Torah & Avodah. (as the avos were - chessed avodah & torah). Gadlus is an extension or expansion of self beyond its previous borders & limitations.
This perhaps defines Gemilus Chassadim of our mishnah as being exclusive as well. The world doesn't stand on just any Chessed. It stands on chessed of gadlus, which is the difference bet. Chessed & GEMILUS chassadim. The gemara shabbos relates why the feet of the gimmel run after the dalet....
The world stands on the chessed of those who LOOK to do chesed. Who run & create chessed, not on those who wait for a need to arise to then help out.