Couldn't you make the same arguments for basically all other due process or privacy protections? I think I can accurately summarize your statement here to:

Mass Surveillance deters crime and makes the job of law enforcement easier. I'm happy to live with Mass Surveillance because I don't think the drawbacks of having it aren't that bad, there are some benefits to me, and I trust institutions to implement safeguards.

Now replace Mass Surveillance with any of the following, and I think the your argument is the same:

  - Warrantless Searches
  - Giving Police the ability to convict in the field
  - Permanent and mandatory position tracking for all citizens
  - Required public identities for all online activity