It’s truly impossible for a single human to actually understand the physics of electronics, the world of CPU micro-architecture, packet shuffling network equipment, the nuance of CSS, and the never ending complexity of UI/UX design.
The only way this statement could be accurate is if you arbitrarily start cutting parts of the “stack” out.
Personal example: I have an electronics engineering degree that was 1 semester short of a physics degree, so I learned quantum mechanics, electromagnetic field theory, transistors, and how to create a CPU (I even created a CPU out of simple gates and way too much wire wrapping). I love computer software, so I learned assembly, how to write compilers and operating systems, and libraries. I have configured network hardware and written network software at various levels. I've also used CSS and implemented UI/UX. I've written code in many programming languages, including JavaScript, Python, C, C++, Java, Ruby, Rust, Common Lisp, and Scheme. I eventually got a Computer Science degree as well.
None of these things are magic, and the info is relatively easy to get. You simply have to keep learning and be willing to try new things. It can be fun, too.
Yes, today it can be helpful to specialize at any particular time in your life. But I think it's best to use that as a launching pad to branch out.
I guess my key point is that you always need to keep learning, and don't box yourself in too much. Ideas from elsewhere will show up... being aware of them makes it easier to use them and be ready for them.
Even if I pretend I don't know anything about AWS, if somebody handed me credentials with access called "FullAdminAccess" and told me to use them for my little script that only needs read-only access to S3 I would be extremely skeptical.
The reality is that the culture at Infosys seems to place zero value on security of customer data.
If you ask for an access key for your little script and get one, you usually only check if it works for your case and not always check if it has any other access, so I can easily see it happening without proper access controls.
At my job the alarm bells would be ringing and they would bring this up, but Infosys doesn't seem to have a culture that promotes that kind of security awareness.
The power of computing is such that every organization on the planet is forced to lower the bar to get people who are marginally competent, even if they lack attention detail and cannot be relied on to solve problems of this sort. This kind of leak is the result.