The short of it is, as you gain real world experience you will realize that the world is filled with looters and thieves, and its up to you to figure out who they are and control your interactions with them so you come out on top. A large part of this is knowing when and when not to share.
It is entirely possible to do this, without being a slimeball. Take a measured approach, set up situations and observe closely. What people do in small things, they do in large things, and evil is most characterized in willful blindness.
You shouldn't be trying to differentiate yourself like this in an interview anyway.
Companies are looking for workers, and the rational creative problem solver people tend to be targeted by psychology profiling and discriminated against at the hiring stage; despite them providing unimaginable value, its a top down problem starting with hiring. AI also is a problem since it allows a new age for employers to bypass anti-discrimination laws based on protected classes.
To understand why these things have been happening and worsening, you need to go into the history of how and why business has changed since the 1960s. Its far too much for a single post, but there are reasons why this happened; largely as a progression from constitutional money to fiat debt and various mechanisms of sieving markets into fewer and fewer hands over time (ponzi).
The failures align with the same failures with any bureaucracy and no one covers this better than Mises (written 1930s).
These type of things will be getting much worse in the near future, so you will need to guard the products of your mind more carefully. Familiarize yourself with the Laws of Power (Greene), learn why these things happen, and prepare.
There may come a time in the near future where you'll have to bootstrap your own grid, and physically defend yourself but until that time, do what you need to and become self-sufficient and mature (by learning about important things like social contract theory/economics and other skills that will improve your ability to forecast).
Loyalty is misplaced in any business today, and trust is gone as the pillars of society fall to ruin.
Never provide your best work starting out, don't mention an idea unless it has a number of subtle pitfalls, understand the business growth cycle (and how its often another form of ponzi through preferential loans), and choose well.
In IT people used to joke about automating themselves out of a job (and how there will always be other problems to solve). We can see now where this mentality led, to 7% unemployment in tech (during peak hiring), where the national average is 1.5%.
Experienced people know the importance to semi-automate, and to also never make anything that will run and provide value for longer than a month without some direct input from them. You don't provide your best unless you are getting paid proportionally for the value.
So it goes.