I'm probably a lone voice here, but why the obsession with speed? Speed of execution is only one (tiny?) component of innovation. I understand the need to ship

I'm probably a lone voice here, but why the obsession with speed? Speed of execution is only one (tiny?) component of innovation. I understand the need to ship, and fast iterations can be useful, but whenever I see these 24 and 48 hour Launch a Startup! projects I wonder how much better some of them could be if the thinking had been refined for more than a few hours. Business that are worth owning (and running) probably deserve more careful and deliberate upfront thought. Maybe these events are just about practice in rapid prototyping and discovering teammates, and not really intended to be "businesses"? EDIT: on further thought, maybe it's just that the participants' opportunity cost is sufficiently low to make doing anything the more attractive option. In that case, Get Out There and Make Something.