The clear implication is that Lee did not fully embrace the lesson of Malvern Hill, which led him to repeat the error by ordering Pickett’s charge.
pretty much the case, IMO
A lot of fine French & German infantry went to their deaths in 1871 because the lesson of massed rifle fire hadn’t been absorbed there either. This despite all the major European armies having staff officers traveling with either the Union or Confederate forces and sending dispatches home.