I don't get how you consider $30k "not a big deal". That's just the average, many people owe a lot more than that.
The median entry level salary is $41k. That means the average student is coming out of college owing 75% of their income. That is ridiculous.
According to this [1] the average payment is $393. If you're making $41k, that's $3416 per month gross, maybe $2300 after taxes and 401k contributions. Good luck finding an apartment in a city with any jobs for less than $1k per month. That leaves you $1300, with a $393 monthly payment you're spending about 30% of your monthly disposable income just to service debt. That leaves $800 for food, utilities, transportation, saving, going out with friends and having some semblance of a social life, dating.
It's not impossible, but don't pretend a nearly $400/month payment is not huge burden for someone in that situation. If they're smart and careful, yeah, they can manage it, but if not, or if they have some bad luck, get sick, any sort of financial trouble and they're suddenly in a huge hole, with no savings and an inescapable debt. The forbearance programs are a joke. Fees and interest continue to accrue and people come out of them owing double what they did when they went in.
You can't say "Oh it's just a Camry!" no sane person would recommend that anyone take out a car loan for 75% of their annual income.
And that's assuming they even finish school and get a median level job. It's the median, so 50% of people are earning less and are even worse off.
There are knock-on effects to the rest of the economy. People are delaying buying houses (if they can ever afford to), having kids. They can't afford to move or take risks, start businesses. What is it going to look like in 20 or 30 years when an entire generation has grown up stunted by this burden?
[1] https://www.forbes.com/sites/zackfriedman/2020/02/03/student...