With respect none of the details give anything away. The main reason is to be able to contact people and be aware if they have overstayed,this may be for safety reasons in some cases. People do go missing. People act like a phone number and email is giving away their life yet they probably fill them in online on a daily basis. Its just a general survey,doesn't seem to have really changed since the time you had to fill them out before you landed. They have these in many countries. I will change my statement to Dumbass,uneducated,untravelled, conspiracy theorists. If you have something to hide thats on that form you probably shouldn't be coming to Thailand anyway.
It used to be a card you filled out,i can't believe the amount of dumbasses saying dumb shit about something so simple... The world is full of idiots thinking everything is a conspiracy and the want to track you everywhere. Heres a clue,Thailand has a huge of cameras everywhere and facial recognition technology works here. And your worried about a landing card๐๐๐