Touch a 50W halogen reading spotlight with your bare Han, the a 6 watt LED and the tell me LEDs are hot yeah they're not cold, but they also won't burn, they'll give of 6W of heat. And if it's a LED lamp with the electronics and driver in the base away from the actual LED then it will be cool and have longer life.
It's also about radiated heat. Use a 50 W halogen as a reading light and your hands will get warm and sweaty, probably you head to as the light is probaby near it and hits it. A LED however only radiates light not heat
I never said they would burn, I said they still get hot... and those aluminum heat sinks on them can get pretty hot even at 5-15 watts you wouldn't grab one by hand when the bulb is on... I know I've pulled out 75watt equivalent LED bulbs when they where just turned off and the heat sink was so hot you couldn't hold onto it... heck I've seen ceramic heaters (electronic component not an actual device) that get up to 450 degrees and only use 15 watts of power