Why should a disinterested, objective financier care if $1 billion dollars of revenue came with a real figure of 20% spambots rather than the estimated 5%? That just means true revenue per mDAU is something like 18% better than estimated.
If the real number is 50%, then true revenue per user is about double. If the real number is actually 99%, true revenue per user is about 20x. There would also probably be some very quick wins for improving the quality of the service.
There may be an argument for needing accurate mDAU figures - but Musk isn’t making one, the financiers didn’t ask for them, the market has NEVER had accurate figures for social media anyway, and there’s no legal standard for it.