Wouldn't that be 'speciest' not 'racist'? Or even xenophobic? (...xeno-ist?)
Basic CT rules do not include aliens. Aliens are covered in the alien modules. Player published material tends to avoid reprinting anything in the main manuals that it has not diverged from (like basic mustering out tables). Besides, these are HOUSE rules, so if the authors want Humaniti to be represented, that's their business; it is your responsibility to add the race-specific house rules for games at your house.
The point of some of the more discussed house chargen rules has been either campaign specific (so you have no right to bitch there about not covering aliens

or to consolidate systems and to get LBB1/S4-ease char gen with characters that match LBB4-6 expanded chargen in skillset. That also means NOT complicating it with the AM1-8 stuff. In addition, those alien-specific careers only apply in that aliens' home region/services! An Aslan who serves in the Imperium is not doing 8 year terms, and follows the standard rollup. This is stated in the module itself. There are a few extra rules regarding gender-skillset restrictions, but thats about it.
I'm working on a variant of Employee's chargen rules and will include the various alien races (theres that word again), but as modifiers, for the most part.
For example, the Aslan sheet would specify what the gender-profession restrictions are, and adapt but not directly incorporate the Aslan specific professions. The Aslan would still use Navy, not the two split enlistee/officer careers. Instead of 8 year terms, the Aslan must serve 2 terms in a row with no re-enlistment roll allowed.
A race-specific additional skill table may be offered, as well as a new 'Race benefits' table - a 3rd mustering out table - that can be rolled on (or, perhaps, MUST be rolled on, with most of the results specifying that the player's roll falls under the career specific table).
But that's a lot of work, and that will occur once I've finished doing up the sheets for the core professions and finish my research into incorporating per-year duties as modifiers to per-term survival/decoration/promotion rolls.