You have opened a full-spectrum topic: Whether to work or study?
Do you actually consider the possibility to work and study at the same time and enjoy it? Do you think a young person has to make a decision between the 2?

Yes, there are problems and you have mentioned quite the majority of them. But you forgot to mention the beautiful parts of this crazy life of missing the lectures. It teaches you some very useful life lessons:

Time management. Because when you have to run from an exam to McDonalds (to work, not to eat), you somehow find time to do 5 other things in between, because you know there will be no time tomorrow. Some amount of healthy pressure boosts your performance.

You meet many different people and see other life perspectives.

Every work gives you a different experience.

Apropo, McDonalds. It is a damn hard underpaid work there, but there are also couple of good things (and I don’t mean discount on milkshakes) behind: It is a school of motivation! Once you finish on a grill at 11pm and your shower at 1am (in order to get rid of that food smell), you might think there is nothing else then going exhausted to bed. However, this is the inspiration to browse job ads and send a couple of CVs before letting your head fall on the keyboard.

I don’t want to make a general statement, but it seems like the strangest people meet to work in McDonalds, KFC and similar. This kind of vocabulary used there is hard to hear even among the drunk university students; then there is a prestige hierarchy issue: guys with white name plates talk to those those with green plates with this “I am somebody, you are looser”. Enough to know this is not what you want to deal with them in your life. Dot. After experiencing this it is much easier to fight the laziness and open your school books.

Working gives you independence,

possibility to earn a little money for travels,

you change your view on money once you are the one who earns them, you learn responsibility. And obviously, money is not the highest added value here.

Living this double life teaches you creativity (what to tell professors, can’t be every week the same), it brings you untypical knowledge to impress the others (such as you know the working techniques of each post officer and so you can always pick up the fastest line, etc.)

Basically, when working and studying, you live the 24h the day is offering. And yes, for the choices, priority is the school, but the diploma is going to be the same in any case, just that another piece of paper, CV, might be very different.

There has to be no choice. I can live with loosing some information from the last courses, the others may forget it after the exam anyway. So laborare et erudio!