Rather than luck, it's more like the result of hard work.
Tips
grammar
Most commonly used in the pattern 与其说 A，不如说 B (rather than saying A, it's better to say B). This structure reframes a statement to offer a more accurate description.
register
不如说 is a written/formal expression. In casual speech, people are more likely to say 应该说 (yīnggāi shuō, one should say) or simply 其实 (qíshí, actually).
