>> It would take the rest of your life, your childrens lives, your childrens childrens lives..
>> to accelerate to the speeds required in the game (without squashing you to a pulp)
If FSD accelerated you, that would be true. However, it does not. You change your "frame of reference" relative to the universe (hence the name, Frame Shift Drive). You exist in a portion of flat spacetime, and cause spacetime to pile up behind you, and contract in front of you. I know it sounds like "Game ", but it is real, according to Hoyle physics. NASA are developing a drive that does exactly this, right now