sorrry, but that sounds like it borders on kefira. Even if it was meant as a joke (which I’m assuming was the case), you have to be careful about making statements like that. Especially in today’s climate in which there are people who unfortunately have taken the bracha of “shelo asani isha” out of the davening.
Famous story: Someone (can’t remember who) met with the Chafetz Chaim. The Chafetz Chaim asked him if he’s a Cohen. The Chafetz Chaim asked him, “Why aren’t you a Cohen?” He was puzzled by the question, but he responded, “because my father was not a Cohen.” The Chofetz Chaim asked him, “Why wasn’t your father a Cohen?” The Chofetz Chaim asked, “Why wasn’t your father a Cohen?” “Because his father wasn’t.”
The conversation went on like that for a while until the Chofetz Chaim finally explained what he was getting at: “I am a Cohen and will perform the Avoda in the Beis HaMikdash and you are not a Cohen and will not perform the avoda in the Beis HaMikdash BECAUSE when Moshe Rabeinu said “Mi LaHashem Aelai”, my great great grandfather answered the call, and yours didn’t. Make sure you answer the call the next time you hear it!”
All of the Shevatim were originally meant to be Cohanim (represented by their b’chorim). It is due to our deficiencies that we were not zoche to be Cohanim. It is a privilege to be a Cohen, and not something to thank Hashem for NOT being! Especially since it is due to OUR own deficiencies that we are not Cohanim.