By what measure are allen bolts "better" or "easier to use"? Assertion doesn't make it so.
Bad workmen blame their tools: used correctly (pushing on the near end of the adjustable jaw) or even incorrectly, any half-decent adjustable wrench is far less prone to rounding off corners of hex heads than most allen keys on those heads because the forces are spread over a longer flat face and it can be adjusted to deal with oversize or undersize heads better than an allen key can adjust to slightly out-of-spec holes. And I'm sure we've all seen someone ping an allen wrench across the floor (mangling the head a little more as it goes) because they hadn't got it inserted properly, but how often do you ever see an ordinary wrench do that?
And "required to use the proper wrench for the job" suggests you've never seen anyone jam a torx bit in or try to use
a pin socket on an allen head!