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Are Index Funds really as good as “experts” claim?
Here is my simplified take: In any given market portfolio the market index will return the average return on investment for the given market. An actively managed product may outperform the market (great!), achieve average market performance (ok - but then it is more expensive than the index product) or be worse than the market (bad).  Now if we divide all market returns into two buckets: returns from active investment and returns from passive investments then these two buckets must be the same as index return are by definition the average returns. Which means that all active investments must return the average market return.  This means for individual active investments there are worse than market returns and better then market returns - depending on your product. And since we can't anticipate the future and nobody would willingly take the "worse than market" investment product, the index fund comes always up on top - IF - you would like to avoid the "gamble" of underperforming the market. With all these basics out of the way: if you can replicate the index by simply buying your own stocks at low/no costs I don't see any reason for going with the index product beyond the convenience.