Buy and hold is just that and with two trades a month you can not even do a good DCA into a fund. I use to break my account up into 20% increments and do a classic DCA into a bottom I can not do that now and that kills if you are not exactly right and that is impossible to do constantly. With DCAing it is much, much better.
Just because Fidelity and Prudential do it should not be a reason we do it that way and if I don't like Fidelity or Prudential's policy I can shop around and transfer my money out of their accounts.
Point is times are changing and even the media dogs will tell you this is NOT a buy and hold environment and will not be for a very long time. If you want to make money you need to be nimble and have options. We are in the age of electronic trading with instant information on the web. Full access to market news, earnings, economic data, trading desks, limit orders, stops, calls, puts, ETF's, inverse ETF's, leveraged ETF's, etc. We need to be on the cutting edge or get left behind by the market leaders. It is that simple, market leader take advantage of new products and trading vehicles. My belief is the day of the buy and holder will fall to the wayside as the baby boomer's die off and a new generation steps up.
We had that with the unlimited IFT and now we don't have it when we need it the most and we are not saving any money with the restrictions like Tracy Ray said we would. Their timing was awful on this and the majority of participants are inactive or not proactive in managing their account or keeping up with market fundamentals or trends.