Job action combos one button

[BokoToloko]

The difference is simple. You can accidentally press the wrong button in your combo. Yeah, it’s rare and yeah it’s a stupid thing to do but it can be done. Removing it would make that mistake never happen. Another move towards making FF too simplistic and boring. The opposite of what people want

At this day, it's VERY hard to break combo. Removing the chance of a mistake that hardly takes place unless you're trolling is completely inconsecuential and, in the jobs where it's more likely the happen, the one button combo would be impossible to introduce without altering the job's gameplay (PLD, DRG, SAM and MNK). Not to mention OP's scenario already exists and is still liable to break (GNB GF combo).