While I do appreciate that I think if you asked an employee "How did this error happen?" and his only and entire explanation was "Well, it was partially due to my screwing up at my job" and then that's all they said, you might be reasonable in drawing certain conclusions about how accurate their use of "partially" is in the response.
But the other side of that is- if you DO accept the idea they only, intentionally, gave a partial and incomplete answer, you now have to consider what the REST of the unspoken answer is.
If it isn't supply, it must be demand.
Thus we can reach one of two conclusions in all this (and I apologize if my previous posts lacked clarity on this, but perhaps the below resolves that?):
Either Tesla is refusing to admit there's an actual, real, demand problem right now (more likely IMHO)
or
Tesla doesn't think demand is a concern and they misused the word partially in the excuse they gave for the really low delivery numbers being production related (less likely IMHO)