I agree that the gameplay value of positionals — as currently designed — to the "average" player's game experience, at this point in FFXIV, is probably being overexaggerated.
However, I am perplexed by the assertion that this statement:
...can be "literally" false?
• It adds potency
• It can be failed
• Not missing a single one usually requires planning and anticipation
It seems to me that, by conceptual definition, attempting to strike every positional on a complex or fast-moving encounter is, literally, a part of the optimisation process.
There's a massive can-of-worms to get into about whether it's a
good optimisation process, but it's definitely there — just like a Caster striving not to drop a single cast, a Machinist striving not to be out of range for heals, and etc.