Although the guy you heard that from obviously doesn't have a lot of knowledge in engine tuning, he's not all together incorrect.
You see a bike tuned for racing will run more risk of decreased longevity in exchange for increased performance. A bike tuned for the street, which basically means getting an ideal a/f ratio in all situations, and will do NO harm.
I've had 3 bikes mapped so far and every time I tell my tuner, and he makes sure to ask....."How is the bike going to be ridden?". And it's written on the work order like that. If a tuner knows it's a streetbike he's going to tune is accordingly.
And besides, The ideal map is far from the Powercommander supplied maps, so you can really do nothing but positive changes with an experienced tuner.