If we followed similar arguments about hardware, we wouldn't have Apple today. The entire premise of Apple's hardware is that it is beautiful, well designed, with attention to details even in places where the user would never interact (motherboard layout and finish).

You might be guessing from intuition that 10-100ms latency doesn't matter, but I suspect that it does. You can feel the philsophy of the company when you use their products and they feel wonderful. It's a culmination of attention to detail in every aspect of development. I love Sublime Text precisely because of how fast it is.