What if you only have one program starting with letter whatever, but this game you installed got 20 helper executables that also begin like that, to the point you gotta actually spell out the whole name of the program you wanna run, while the helpers under normal usage, you should never need to run yourself at all?

Only things you routinely need to call from any folder, or that programs need to call without knowing the full path, should go into PATH, everything else just gets in the way.


And you can use path completion for each step when spelling out a full path yourself, not really so much additional work.