Correction here for you. You do not have to play a lot to do 90% of the game. In fact, creation is not needed unless you're doing savage content.
You're looking at it from a, "I GOTTA DO 99 RUNS NOW NOW NOW" mindset. That's not what the option is for. You can take your time. The mount is not going anywhere. the 99 is a safety net. If you did the content 99 times and still didn't get it, you get a pity trophy. Square did that for, you guessed it, the more casual player that cannot get on everyday to farm this mount.