What you do as your first job massively influences you career. I did .NET for years by the fluke that is what my first job did. If they did Java, I would be an expert in Java. If I worked somewhere they needed a compiler written in C++ I would have done it and may have a compiler career.
The paradox is as a graduate you generally, unless very exceptional or well connected, or live in the (not "a") tech city, just need to get that first job.
It is hard to get that breaking opportunity, and so that thing that will have echoes throughout your career, you don't have much control over! The reason it is hard to get the first job is because it needs interview experience, and you have very little proof yet. You are asking a company to take that leap of faith.
Later side stepping is possible but very hard as you are competing with people who can be paid the same as a web dev with deep experience.
Also as a young person back then, I had approximately zero confidence, both in myself and even that programming is a good thing to do. Getting into it was very weird, I was probably the only person at my high school of hundreds who geeked out on electronics and programming, for example.
Nowadays with HN and other sites, there is an online community such that even in a country town you can get a sense of community and what is possible. With that any graduate now could hatch a decent plan for their career. They might take any job to pay the bills, but aim to get into a FAANG for example, knowing what it pays and how to go about it. 2020's are amazing.
I am regularly up at night in a cold sweat worrying about how if I suddenly find a technically fulfilling job, realizing I forgot everything about computers after a decade on working on meaningless front end JavaScript framework.