I hear you. Maybe in racing where seconds counts? And of course, consumers want what the "pros" use. But also, as WP states, The weakest point of a bicycle rim is usually the hole for the valve stem. The smaller hole for a Presta valve makes it possible to have extremely narrow wheels while maintaining sufficient strength in the wheel. 
But then there is the "The Dunlop valve, (also called a Woods valve or an English valve) is a type of pneumatic valve stem in use—mostly on inner tubes of bicycles—in many countries, including Japan,[1] Korea, India, Pakistan, Sri Lanka, most European countries, and a number of developing countries." 
"Solution #1 is not ideal as Prestas are so fragile they can and do easily break when putting the adapter on. Often the Adapter will get stuck on the Presta causing you to have to buy a new tube and new adapter. "
Not my experience, though a couple times the whole valve has come out.
"Solution #2 is bad too, Presta again brake. See the picture above. The Presta broke and one part was stuck in the pump rendering it useless. "
Not my experience either after many times, but at the price I paid then the cost would be small. But thanks for the feedback.