The difference of going for it in my mind
Cubs are "going for it" if they trade Zambrano, etc to get Lowell. Otherwise they can trade other guys for a decent upgrade that's low risk (Jose Hernandez if you will). I don't think cubs fans said "well, we're going for it" after Jose donned a Cubs uni. Sure, they are trying to improve their chances. But if it doesn't work, no biggie, right. Now, if they go for Lowell, you'll find cubs fans saying "this is the year"...and they'll be giving up the farm to go for it.