Again, you're failing to grasp the implications of supply outstripping demand. If you are unsuccessful in the first cycle then you become even less competitive compared to those who were successful in the first cycle.
Now you're suggesting you can get an opportunity after multiple cycles but then if you don't like it, you still don't know what career you want and it's close to graduation time.
It's not enough to simply be competent, that's not how competition works. You need to be better than the other applicants.
If there are 5 jobs and 4 hard-working students then yes, if you put some effort in you'll be able to get that 5th job. But if there are 5 jobs and 6 hard-working applicants then it's not enough to put in a 'mininal amount of effort' you need to be better than the top 5 competitors.