I'm going to challenge this as you didn't give specific data to back it up. I read an article recently that did have data, and it made the argument that first jobs, and first salaries, tend to be remarkably "sticky". That is, if you are desperate for a job out of college so take one that causes you to be underemployed and underpaid, that doesn't just stick with you for your first job, but data showed that people were underemployed and underpaid for at least a decade after college.
The advice in this article was to hold out as long as possible for a desirable job, which meant a ton of networking, taking internships if possible, and also possibly additional schooling.
Apologies for not having the article on hand, but here's another one I found in 30 seconds of googling that makes the same argument, with research:
https://www.highereddive.com/news/half-of-graduates-end-up-u...