An expert's DCF valuation isn't worth the paper it's written on.
Valuation guru Aswath Damodaran has a history of making well-researched, well-reasoned and well-argued DCF valuations which turned out to be complete nonsense in hindsight.
Here's one from 2012 where he predicted Facebook was worth less than $75b, a far cry from today's valuation of > $515b.
Shortly after Google's IPO he reasoned they were worth about $100 a share, somehow overlooking about 90% of that company's value. This isn't just some random bozo he is one of the leading influencers in the field.
30 day MA is a fact, everything else is an opinion. And you can buy any opinion you want.
If these hedge gurus knew Aruba was worth a lot more than the market was paying they should have backed up the truck and bought everything they could afford. That way the HP premium would have paid handsomely and no need for a lawsuit.