I'm guessing that anecdotal interviews that do not support your theories on a given subject are dismissed with a wave of the hand and a curt "You're full of it."
The problem with anecdotal evidence is that people use a statement or statemements from one or some to justify the mindset of an entire population. Anecdotes give qualitative research a bad name. True qualitative research aims to cover as much of a population through as much of a rounded sample as possible, but when your population becomes the size of Boston radio market, true qualitative research becomes nearly impossible to run, given the time frame of turning around that a company is looking for when making such a decision.
Even then, scholars debate the validity of qualitative research, because sample sizes can't come anywhere near a confidence level of that gathered in quantitative research.
Quantitative: You conduct surveys and run an analysis of all responses to find your answer. In other words, I send out a survey of radio listeners, put their responses into a computer, then have a statistical program run my analysis. The only drawback is waiting to get responses. Your sample can be in the thousands, as the raw data is inputted into an algorithm. Quantitative gives us a sample that yields an answer with confidence.
Qualitative: 1. You can conduct a focus group and/or interview, which will require you to sit with every participant, ask the questions, take notes, record and transcribe the conversation, then run an analysis, coding every statement through multiple cycles of coding. For a sample of 20 people, we're talking months to do the whole cycle. One interview alone may take an hour, and it's most likely that you will have follow-up questions. There's another hour for a second round.
2. You can conduct a case study, where you spend months observing and interviewing a sample of people. But, doing so with a confident sample size would be years to decades of research. By the time you found the answer, the data would be outdated, and people's preferences would change. True qualitative research is best when examining a small population. If I wanted to know the listening preferences of the six people living in Centralia, PA, then I could run true qualitative research.
I say that as someone educated in both methods, yet works far more with qualitative research. Big A and David would explain it better, but they run (most likely) a mixed-method study with heavy emphasis on the qualitative side of the research. I'm sure they ask questions to get a better understanding of why, but I would suspect that they run statistical software to help find their answer.
In the end, anecdotal evidence is only good to tell me what the one or few people think. It doesn't lead to an understanding of what the whole group feels. People do this in all areas of life, and it's a huge problem, because we make definitive statements based on what "our five friends" said. Even 100 people saying something doesn't equate to the overall population. It's the same as having fun with percentages. People would say that 98% of people who catch COVID survive. True, but 2% of a billion people equates to 200 million people. Then on the flip side, imagine having an argument with a school district administrator who was upset about 50% of a particular school's fourth grade failing an assessment; then finding out that the school was an alternative school for kids with special needs, and the fourth grade was comprised of two students.
Anecdotes and gross generalization of percentages are like declaring the state of a forest based on some trees. "It's a forest of birch trees!" Why do you say that? "Because these trees right here are birch trees!"