No it can be skill. Was Warren Buffet and Charlie munger just lucky, year after year? Was Michael Burry of the Big Short just lucky to short the mortgage backed securities market, no he also side stepped the dot com crash and bought value stocks, recently he had very nice shorts on Kathy Woods ARKK... clearly he isn't just lucky, he has skill. I used to think I have skill yet my results were random for about a decade, then I grew a lot emotionally and in wisdom/perspective, and now I too beat the market average in both return and risk.