The general idea was the same though. An international organization is useless unless all the great powers are voluntary participants. But the great powers won't participate in a organization that works against their interests. Therefore, the organization needs to kowtow to the interests of all the great powers.
The only thing about that that's changed from 1945 to 2023 is the criteria for being a "great power". Then, it meant being a winner of WW2. Now, it means having a large nuclear arsenal. The fact that there's a very strong correlation there is of course not a coincidence.
It depends on the job fair. My mid-tier university's career fair was as you describe. From talking to (women) classmates who attended Grace Hopper on the other hand it sounded very worth it. The lines were short (in the mid 2010s anyway) and many of the companies in attendance were scheduling next-day, single round interviews with job offers sent out by the end of the week. I have no idea if it's still like that but I can't say I'm surprised that, given how the tightly pool of entry-level jobs offering visa sponsorships has contracted, affected male students have gotten desperate and shameless enough to try it.