You seem to not be understanding so let me break it down.
Playable - you can play as this
You have a list of playable character options in the character creation section of the phb, and additional ones provided by sourcebooks.
If it isn’t a playable character option, it isn’t playable. RAW. It isn’t an option. It isn’t playable.
RAW. Let me get that through your head.
“Rules as written”
Not RAI.
Not “rules as intended”
RAW.
Written.
I guess the difference is that those of us that would argue with you would believe that you are reasonable individuals whereas, shocker, the genociders are not reasonable.