Earlier quoted context omitted.
... sort of. Past a certain level of complexity you get into trouble with just PLC programmers alone. Don't get me wrong. tend to also have electrical skills and some are pretty good at their jobs, and you can learn a lot from them! But ... they're not programmer programmers. It's a different skill-set with only so much overlap.
The ladder paradigm has its place, as does function block diagrams, as does what the plc vendors call ‘structured text’. controlling physical processes like oil refineries, power generation, or sawmills is different from most computer programs as are the consequences of bugs or errors so it makes sense that it takes different people with different interests and skills.
PLCs replace relay circuits for Industrial Electrical technicians (hence: Ladder). And make no mistake: relay circuits are important, and is something they are very adept at!
However, this doesn't imply that they are automatically able to write or debug regular Python or C code or what have you.
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PS. If you let a PLC programmer at any language, they'll find a way to do ladder logic. Illustrative example (combining some features I've seen in textbooks and IRL, formatting included):
if Tank_Level_Reached == True and EF132121 == False and Ready_To_Start == True and Finished == False and Belt == Not_Ready and Stage == 5 and Position_Left_Arm == Up :
move_left = True
move_right = False
if Tank_Level_Reached == True and EF132121 == False and Ready_To_Start == True and Finished == False and Belt == Not_Ready and Stage == 5 and Position_Left_Arm == Down:
move_left = False
move_right = True
if Tank_Level_Reached == True and EF132121 == False and Ready_To_Start == False and Finished == False and Belt == Not_Ready and Stage == 5 and (Position_Left_Arm == Down or Position_Left_Arm == Up):
move_left = False
move_right = False