Volvie, I opened the sifrei halacha and didn’t FIND these “100% valid poskim who hold one should drink himself to the floor”. The ball is in YOUR court to find the mainstream poseik who backs up your view of the mitzvah. I quoted EVERY nosei keli on the pages of the Shulchan Aruch, and the ones in the back. I also quoted the poskim acharonim. I can’t find ANY who say that today one SHOULD be mekayem it “kepsheuto”. Please tell me who I missed. As I’m just a balabos, I’m sure there must be some lamdan in your beis midrash who knows the source for a “held-of poseik” who says one SHOULD drink himself to the floor. No such poseik in the Tur, Shulchan Aruch (Mechaber is pashtus agreeing with what he wrote in the Beis Yosef), mishna brura, aruch hashulchan, etc. “Oilem goilem” or “everybody does it” is not a poseik in my book. The mishna brurah is, and he disagrees with you. I can’t admit to a fact if no poseik I look at agrees with it.
The only tzad is the chayey Adam (who is NOT the yeshivishe olam’s poseik- the mishna brurah is). He says “chayav adam lehistaker, ulekol hapachos yosier mekedei ragilo”, but even he adds that 1. One who would be mezalzel in a mitzva shouldn’t get drunk and 2. One’s actions should be lesheim shomayim. As minors are much more likely to be mezalzel in mitzvos when they get drunk, one can’t even claim it’s a mitzvah according to the Chayey Adam.
But, as pointed out, the MAJORITY of poskim hold there is no MITZVAH to do so, and according to many it’s an aveirah. So giving alcohol to someone who already had alcohol (assuming it’s the daytime, when there’s a chiyuv to drink) is a KULA, not a chumra, since according to most mainstream poskim there is no mitzvah to drink more, and according to the mishna brurah (THE poseik for the yeshivishe olam) one SHOULDN’T drink more. At night, of course, when there is NO mitzvah, then getting drunk is like any other day and it completely assur.