The short answer is no! There are dozens of events for techies to go learn about great tech stuff. I go to some myself, and enjoy them, but the aim of indieconf is different. While many (most?) of the attendees will have a technical background (developer, designer, etc), the conference is meant to focus on the soft-side of working for yourself. Sessions cover the financial, legal, emotional(!), marketing and yes, some technical aspects of working for yourself, and yes, many of the attendees and speakers are web folks.
However, there are a historically 'freelance' professions that would benefit from indieconf - writers in particular. I realize that 'writers' is a huge category, but so is 'designer' or 'developer'. We all do project work for clients, typically bill by project or hourly, often have to get really creative with deadlines and such, etc. Beyond those similarities, though, web projects need good writing. It might be sales copy, or marketing pieces, or technical writing - the list goes on.
Often, web folks will try to wing it with their own writing approach, and the results can be ugly. Finding talented writers they can develop professional relationships strengthens both parties, and gives each person access to skills and potential projects that they didn't have before. By the same token, many writers have clients who need digital distribution and technical assistance with their projects, and choosing the wrong tech can be just as disastrous as a techie writing their own copy :)
Another group that would benefit from attending indieconf is small web agencies, simply to grow their network of available freelance talent in the area. Many agencies have their 'on call' people available, but life happens, and those people may eventually move on, or simply not be available when needed. Small and medium web agencies have a constant need to be on the lookout for available talent, and indieconf has that talent in droves - pretty much every attendee is ready to start doing business with you.
So just because you're not a geek don't think you shouldn't come to indieconf - the focus is on helping people use technology to succeed on their own terms, and networking with others with similar goals.