No one will doubt or throw skepticism if you start a tech company. After all, you were with one of the best tech companies in this world — you know what it takes. You get advice because you want to start a creative company.
On the other hand, if you happened to be with Ogilvy and wanted to start tech company, you will get same skepticism. No one will doubt if you are starting another creative agency because you would have been with one of the best.
For me the doubt make sense because road to success in creative industries are full of corpses. However, if you could combine photography and tech you could probably skip that road and rather invent a new one.