I don't find that to be an acceptable reason for any pairing unfortunately. Just because someone else won't have anyone, that doesn't make a good reason, or main star. Here's a good reason as to why one would support Creddie: Freddie really likes Carly, most likely it's infatuation, but he has a major crush on her. He's growing, he's maturing, and Carly is starting to see some maturity in him rather than the immaturity he held when the series began. So most likely, Carly will give him a chance, and Creddie will happen! Plus the way you make it sound can be said the same for Sam as well, for if Creddie happens, Sam will get nobody. Is that fair for her? She is one of the main stars as well. So you can't really use "Carly would get no one, and she should because she's the star" that's not a proper reason. Also if that was the only reason, that would apply for any male on the show whatsoever....you need a much broader reasoning than that...I'm sorry, but before you can possibly debate this, you need to look deeper into things.
Unfortunately, that can be an acceptable reason, putting all rationality aside, and focusing on the aim of the show itself.
Carly is the main character, so they want to put her in the spotlight.
Therefore, they put her crushes as the priority.
BUT his doesn't usually roll for Nick shows. It's a new formula for Nick, so we'll just have to see. It seems to be anyone's game for me - but when Freddie said "y'know, when girl rip on guys, it usually means they have a crush on them", I figured they might be hinting at Seddie.
However, I still think Creddie has a chance... Freddie is very young, awkward looking, and obssesive, which is probably why Carly is turned off to him. As someone else mentioned, this might be a development thing.
I saw Nathan Kress on the 'taking over Nick' thing, and yowza! That boy GREW! He shot up, his voice dropped, and he's actually getting pretty cute. lol.
As the show progresses, and Freddie continues to get better looking, and grow out of his crush on her, Carly may later on find that she likes him back - it may be a development thing for her too.
What I'd LOVE to see is some Creddie angst... Freddie could finally stop being overtly obsessive and consider liking Sam. Carly would find that she's jealous, and he could use the "you had your chance" thing on her. And then they could kiss and live happily ever after ^_^
But, I dunno, it seems to be anyone's game right now . *shrugs*
I'm really still kind of on the fence for pairings of this show (a little more partial to Creddie)... Jeez, it's so much easier to ship a couple when the actors are grown and hot xD
And I think I started leaning more towards Creddie when Carly pinned him to the ground. And when Freddie set up that security system in his locker because someone stole his fruit scented markers... I was like "awww" when Carly handed them to him. Dunno why, but I thought that was cute - and she knows his locker combo. I thought that was cute ^_^