Honestly, I don't think there's anything wrong with it. People will 'know what they're getting into,' for a total lack of a better term. They'll learn who sympathizes and who doesn't.
I'm not the handiest person, and so I don't expect anyone to tap into me for nitty-gritty washer and dryer repair. I'd also not make a good spotter. But people do know that they can come to me with their problems, though, and so they do. I can also be a sounding board. (Again, no value judgment here. Just sayin', strengths and weaknesses.)
And people fake sympathy and politeness all the time, though it's usually kept at a stranger-on-stranger level. Cashiers fake their smiles at times. There's nothing really wrong with any of that. While honesty is refreshing, on that level it really doesn't matter. (And if it does to you, then you should give a sound 'hello' to human nature.)
But you shouldn't expect the same in return. If you do, then yes you are a dick. And an emotional leech. A sink. A void.
And if you're manipulative (for the bad), then yes you are a dick. I don't fake being a handyman, you know?