I dont think there is anything problematic in simply encouraging people to vote, even if you tend to reach certain groups better. A higher voter turnout should be something to strive for, its a sign for a healthier democracy. The current approach to discourage more voters of the opposite party to not go voting then your own get discouraged seems more then just a bit problematic.

Differently put, what harm is done by getting people to go vote when you are not influencing them to vote in a certain fashion? I would argue that only the opposite is problematic, to discourage people to vote.

Googles motivation shouldnt matter as long as they are not influencing who you are going to vote for.

But thats another topic on its own, I find it hard to argue why google should be singled out in a country where even news organizations endorse candidates. If they are to powerful dismember them instead of making a lex google.