There are some people won’t touch anything to do with open source projects as they feel it might have issues with security. What does open source actually do for security or change how it works?
The reality is that virtually all widely used modern codebases contain at least some open source code (source).
the reason why many companies try to avoid using open source software is support. they usually can’t throw money at the creator to fix their problems or create custom solutions for them. which is kind of not accurate anymore today.
In college I was told over and over that SECURITY BY OBSCURITY IS NOT ACTUALLY SECURITY. So using thoroughly tested and examined security techniques from open source software is the gold standard.
There are known secure algorithms that cannot be cracked by modern computers. So, no reason to try and reinvent the wheel and just hope your way is better despite decades of refinement and research into modern open algorithms.