If the answers to your final are easily Googled then you’ve written a shitty final.
Allowing students to take exams alone, at home, unsupervised is just a recipe for disaster without surveillance. It's not just Google but any sort of help in the room or remote, which can go all the way to someone else taking the exam. That really simply is the reality. I don't think this is contentious and I am surprised by the debate.
On the other hand, it is of course possible to discuss how far surveillance should go and how perhaps to avoid too much intrusion (as mentioned in my previous comment). That said, with the expensive connectivity people have these days, in addition to all they can think of if the exam takes place at home this is really an arm race situation.
So, again, the alternative is good old in-person, on-site exams, where students are also under surveillance, by the way, but that feels less intrusive because students aren't in their own private space at home.