Often we hear pithy quotes by famous people but some just don't hold water.
"Computer science is no more about computers than astronomy is about telescopes."
Usually attributed to Edsger Dijkstra, the quote tries to capture that using computers or even programming is not computer science, which I agree. But computer science is most definitely about the computers, making them connected, smarter, faster, safer, reliable and easier to use. You can get a PhD in computer science with a smarter cache system, you can't get a PhD in Astronomy from developing a better telescope lens.
"If your laptop cannot find it, neither can the market."
This quote by Kamal Jain is used to say a market can't find equilibrium prices when the equilibrium problem is hard to compute. But to think that the market, with thousands of highly sophisticated and unknown trading algorithm combined with more than a few less than rational agents all interacting with each other can be simulated on a sole laptop seems absurd, even in theory.
"If you never miss the plane, you're spending too much time in airports."
George Stigler, a 1982 Nobelist in economics, had this quote to explain individual rationality. But missing a flight is a selfish activity since you will delay seeing people at the place or conference you are heading to or family if you are heading home. I've seen people miss PhD defenses because they couldn't take an extra half hour to head to the airport earlier. If you really have no one on the other side, go ahead and miss your plane. But keep in mind usually you aren't the only one to suffer if you have to take a later flight.
I take the opposite approach, heading to the airport far in advance of my flight and working at the airport free of distractions of the office. Most airports have the three ingredients I need for an effective working environment: wifi, coffee and restrooms.