What can I do when feedback says someone like me should not pursue an idea?
Tyra Banks described being told that fiction writing didn't fit the work people already knew her for, and her account separates criticism of an idea from an assumption about who's allowed to have it. When feedback comes, ask what's being judged, whether that's the audience or the execution, the budget or the job you held before.
A specific objection can be investigated. A label about your identity doesn't examine the proposal.
You can keep the useful information without accepting every conclusion. If someone doubts your writing experience, you can look for qualified editorial feedback, and the story doesn't have to be dropped because it sits outside your familiar role.
Work out the next evidence you need and how much effort you're prepared to put in. Find people who can assess the actual work, including someone willing to tell you where it's weak.
Not every rejection has to become a success story. You do need a fair basis for deciding whether to continue. Don't let your previous identity set the limit on what the work gets to face.
What to try this week
Sort the last piece of feedback that stung into audience, execution, budget or your old job title. Pull out the objections you can investigate, then ask one person who'll assess the work itself, weak spots included, to read it.