Marce,
In view of your 6th thread, although I'm still new to PCB design field, I do have the same feeling like you. The problem is nowadays even a high-school graduate can also be hired as a PCB designer with "engineer" title. This is somewhat disappointing to me as I do spend a lot of effort starting from zero figuring out what is return current loop, how to visualize the flow of current on PCB, apply basic electronics theory, till DFP...
Even some "big" companies do view PCB design as a sub job scope for an engineer, not a main scope for RnD and successful product implementation.
For instance, I am transferred to Japan now for job training, what really astonished me is my so-called tens of years experienced colleague are all high school graduate who designed board up to 12 layers motherboard which involves a lot of signal integrity issues. PCB manufacturers has provided them with stackup recommendation, what they need to do is just follow blindly the clearance and trace width recommended by the manufacturers, no pre or post design simulation, yet not equipped with proper knowledge of differential signalling and deskewing issues.
One thing I really can't figure out is how come there is no signal integrity issues fed back yet till now with such design???? I guess most probably the product is not working in a harsh environment...
I hope from now on everyone would pay respect to PCB Design "Engineer" as this is not a 1+1=2 job especially to those circuit designers who ignore us always!