If it were anyone other than Elon Musk, I would agree.
But the man has long been obsessed with “X” as he sees himself as the #1 Gen X’er on the planet. It’s why he named his first company X.com and one of his kids “X”. He tried to change PayPal to “X”, he named one of the Tesla models “X”, and he founded SpaceX
It was done purposely, but it is not related to x-rated for adult content.