Look dude.....seriously read this post and take heeds to my words.
You purchased Fallout 4 because you wanted to play it. Fallout 4 didn't come with Automatron. That was extra.
You purchase Automatron because you want extra. The game developer gets to charge what they want dude.
How many people worked on Automatron? Lets say 5 people wrote and/or worked on the DLC. 5 people x 40 hours x around $40 an hour (based off of average game developer salary)
Lets say that 3 months of work went into Automatron. Design, writing, voice acting, the cost of recording and mixing it down into viable game audio.
5 people x 16 weeks @ 40 hours a week x $40 an hour = $128,000
ONE HUNDRED TWENTY EIGHT THOUSAND DOLLARS plus recording costs and other costs we don't know about, to sell you a DLC for $10 that they didn't have to do but they wanted too because folks need to work, folks need to get paid and Bethesda actually gives a crap about its product and its gaming community.
So in a rare moment where I am going to be rude....shut up, you whiny ass little baby.