It's kind of unrealistic to expect a human being to somehow rigorously partition their creative process to respect a myriad of complex legal restrictions.
Imagine your profession is to envision the future. Now imagine the companies you've worked for all have very restrictive NDAs. You can't reason out the future very well when pieces of this thought tree have veritable locks on them; their presence alone jarring to creativity itself.
Such this. Everything I build, regardless of for who, ends up having a very similar smell. I reached conclusions about how things work well years ago. It’s difficult to reinvent the wheel when you already feel like you’ve perfected it.
I would rather claim that this is a peril of laziness.
Source: https://en.wikipedia.org/wiki/High-Tech_Employee_Antitrust_L...
Like say Apple, the most valuable company in the world.