For one, you could likely not avoid it if the gov did it, while you can "just" chose to not use that site.

For second, just now the post about the auctioned japanese gov disks with tax payer info on them, illustrates how such sensitive data can be lost.

And third, the risk of abuse. All it may take is an election.

So I think it's ok, although not the best, to do have a look at those in power even if the looker has a dirty house themselves. The alternative is worse.