agreed it's a silly question especially if someone reading it has the goal of becoming the 'complete MAist'... but I disagree that it's 'wrong'.
everyone has their own goals for training (or not training for that matter). If the goal is to be able to hit harder, then concentrating on technique(s) towards that end is not wrong.
if someone has a balance issue for instance, concentrating on improving that exclusively for a period of time may be the step towards a longer term training goal.
Is it more 'correct' to maintain a uniform curriculum vs diving deep in a much smaller set of techniques that are tailored for personal goals?