Professional traders spend about thirty seconds choosing a time frame (if that) because their choice of time frame is not based on a trading system or technique, nor upon the market that they are trading (usually), but upon their own trading personality.
For example, traders that like to make many trades throughout the trading day might choose a shorter time frame while traders that like to make only one or two trades per trading day might choose a longer time frame.
The reason that professional traders do not spend endless amounts of time searching for the best time frame is that their trading is based upon market dynamics (excepting the statistical traders), and market dynamics apply in every time frame.
For example, a price pattern that has significance on a 2-minute chart will also have significance on a 2-hour chart, and if it does not, then it is not a relevant price pattern at all. In other words, if your trading system or technique is not making a profit, there is nothing wrong with the time frame, but with your trading system or technique instead.