Demonstrably false considering massive wealth inequality and poverty. It's incredibly harmful and uneducated to hold such a callous opinion. It also goes against the plentiful studies showing that socieconomic status (SES) is more significant predictor of success than almost any other attribute.
Simple scenarios:
- immigrants/refugees moving to a different country
- getting visas in what is largely a lottery system
- injury luck with respect to athleticism
- access to equipment and instruments with respect to musical talent
- slavery and generational poverty
The idea that _capability_ is anywhere close to as important as luck fails so many simple tests (let alone empirical studies) that your statement offends me a little bit.