If you want to make a fair comparison, you have to compare apples to apples, not apples to oranges.

If you are a client and your therapist drives by your house on a public road not accidentally but intentionally, I really hope you'd end therapy with them. The same applies to therapists. So, in this situation therapists and clients are also on the equal level, there is no contradiction and no hypocrisy here. Whether you are a client or a therapist, if you decide to check out where your therapist/client lives and if you do it more than once, it's officially considered stalking. It's not like people "choose" to put their houses out there for public view. All houses stay in public view unless you are rich enough to live in a secluded gated community. So, people don't really have an option to "hide" where they live. But they do have a choice of making their personal information public online and they do have a choice of how much they want to put for a public view. So, the rules are the same for therapists and clients. Googling is ok for both, stalking is not ok for both, so I don't see any hypocrisy here.