They didn't have options - every single Google employee(past and present) has options. They selected this one, voluntarily. Indentured servitude is not a valid analogy.
Also, there exist the concept of a so-called "unconscionable contract." I'm not saying this proposition is true, but I'm submitting for evaluation: is the act of submitting to private investigation processes that may be used as evidence against you in civil or criminal courts unconscionable?
[1] https://en.m.wikipedia.org/wiki/Indentured_servitude_in_the_...
There may be a very small number of cases where an employee successfully negotiated against this clause, but it probably requires the candidate to be a true outlier in terms of talent and skill set for the company to even consider it.