A quick look at the list showed me that there are 16 electric utilities in the list, namely NGG, EXC, D, NEE, PEG, ED, ENI, EIX, PPL, ETR, XEL, DTE, SCG, PNW, DPL, and WR. There are also 3 telecoms: CTL, TKC, TNE.
I have owned some of these names in the past. Yes, they pay dividends, but the stock price may not be any less volatile than some tech stocks. For example, Excelon (EXC) share price over the last 10 years has ranged from the mid 20s to 90. It is now at 41. Compared that to Intel, whose share price has ranged from 33 to 13.
Conclusion: There are always more than one way to lose money.
Dividend or not, it still helps to "buy low, sell high".
The above said, I may look to pick up a couple. I currently have XLU and UTH, which are utility ETFs. Their dividends are a little less than 4%.