I do care. If I buy stocks to hold and sometimes re-balance the difference between spreads between liquid stocks (as in markets with active HFTs) and not liquid

I do care. If I buy stocks to hold and sometimes re-balance the difference between spreads between liquid stocks (as in markets with active HFTs) and not liquid stocks (as for example in market in my country) is huge. Those things add-up. I also want efficient arbitrage done by HFTs. I don't want to sell or buy being unaware of some important news. HFTs ensure I get a fair price without following the news every time I want to buy/sell something. The more efficient the market, the more liquidity and the lower the spreads - the better it is for me as an individual buy and holder.