Netdecking the stock market

In MTG, Netdecking is where you look up someone else's brilliant composition on the internet and duplicate their deck card-for-card. You benefit from a proven setup, but you still need to know the game and how to play, and even then won't do as well as the inventor of the win-condition. Is there an equivalent of this for the Stock Market? I don't want to spend hours upon hours digging though the nitty gritty (no judgement, just not for me). Can I copy another portfolio (like Berkshire or Elon) a