Candidates who Respect Voters and Candidates Who Don't

Each year the League of Women Voters and many other groups send questionnaires to all candidates from all parties asking for their positions on the issues, so the voters can vote intelligently.

However, if you look at the Voter's Guide published by the League of Women Voters, for example, you will find that some candidates simply refused to show respect to the voters. They didn't even respond to the request for their views on the issues.

For example, in my district the State Senator is Democrat Roger Manno. He gave detailed answers to all the League's questions and he has a website where he gives even more details about his positions on the issues. 

His Republican opponent is Felix Gonzales. He has not responded to the League's questions at all and he doesn't have a website or, as far as I can tell, any other place where he could tell the voters his views. 

Despite this, some people are saying voters should elect some Republicans for "balance." Why? Do the people who say this want voters to blindly vote for candidates who don't tell the voters anything about what they would do if elected? Isn't that the opposite of good government?