That's your opinion on what Tanaka could be.
My opinion is that he's the same, except he gets a free pass because he's working in the entertainment industry (a lot of people in the entertainment industry get this sort of free pass, like Cocorico's Endou, Savanna's Yagi and so on). In an Ariyoshi show and a few other prime time and late night shows, such as the Tousouchuu with him and Umeda in it, he's shown that the desperate attitude is more genuine than "for show".
See how you're excusing all his actions just because he's a tarento and comedian? Even though he and that crazy Iwata fan have/are basically doing the exact same thing? (Proposing, acting too overly familiar, trying to step over the line on more than one occasion).
Just because they're on TV, that doesn't mean one should excuse their actions or act like it's "just an act", because these people themselves already know that they can get away with such things, and thus have a choice of intentionally doing things like that and saying "it's all acting", and having people like you immediately believe them.