The quant-vs-qual debate usually gets framed as a competition, but they answer different questions. Quantitative research is good at telling you how much and how often; qualitative research is good at telling you why and how.
When quantitative wins
If the question is about scale, frequency, or comparison across groups, quantitative methods — and the statistical tools that come with them — are usually the right call.
When qualitative wins
If the question is about meaning, motivation, or a process that hasn't been well mapped yet, qualitative work gets you closer to an honest answer, even if it's less tidy to report.
Why not both
In practice, a lot of the strongest research designs combine both: qualitative work to figure out what's actually happening and why, quantitative work to measure how widespread it is. I try to resist picking a method out of habit and instead let the question decide.