People spend $1100 getting their decks designed!?
Our pitch deck was just black text on a white background but would have loved to have thrown some design time at it.
The problem is that pitch decks are (or should be) continuously updated, so it's not exactly a one-time cost. (That, or you have to learn enough PowerPoint skills to update it yourself).
While the stories of "here's how I raised my series A in 7 days!" make good stories, the reality is that most fundraising cycles are not like this. They're longer than people expect, and they're an iterative process.
Given how much is riding on this you want as much external feedback on your deck as possible.