Just as a note, #2 is the Shepard breakdown, and that's the only thing it tells us is what gender of Shepard was completed. It's hard for us to definitively conclude who was playing those Shepard's, even if it's a logical conclusion (note, logic often doesn't reflect reality).
It's also important to note that the default for the game was male. Much like how the largest bulk of DAO's players were Male, Human Noble warriors. It's possible that the data cited doesn't lead the conclusions that people think it might. It's just data. We'd need to do experiments which is trickier.
The statistics do tell us that more players are interested in playing Male Shepards than female.
Since women make up roughly 40% of console gamers, much higher in mobile gaming, (using the stats from the previous page) I'd expect the ratio of FemSheps to MaleSheps to match that roughly 4:6, but its closer to 2:8. While you are right there is no way to tell firmly how many women played FemShep vs MaleShep but for argument's sake I will stick to the logical conclusion. So I am forced to conclude that either women make up a smaller percentage of console gamers than previously believed, I find that unlikely, or the game was played predominately by men, more likely in my opinion, or there were significantly more women than men playing as the opposite gender Shepard, possible but a bit unlikely.
As for Shepard being default, the options on the New Game Menu are:
Start Default Shepard (leads to Sheploo, Soldier, with preset service history)
Start Custom Male Shepard
Start Custom Female Shepard
So I don't see how the default Shepard being male would dissuade people who already have the game from playing a custom Shepard.