Well, yeah, obviously it's not just Southwest's incompetence at play here, otherwise they'd be cancelling flights all the time. The weather contributed, but it was just a trigger. The house of cards had been built by SW management long before the weather rolled in.
"Southwest has generally struggled with coordinating its operations as of late; it had the highest percentage of cancellations and worst on-time performance among the country’s four major airlines in June and July. The Southwest pilots union further blamed the company’s technical systems and processes for reassigning pilots when disruptions occur, claiming that these are long-standing problems that executives have failed to fix for years. The airline has struggled with rerouting pilots partly because it uses a “point-to-point” system, which focuses on flying passengers directly to their destinations. This is opposed to the “hub-and-spoke” model that American Airlines uses, in which passengers are often first routed to a main base of operations before departing for their final destination. While the point-to-point system has the advantage of reducing travel times and the number of connecting flights, it can be difficult to adapt to unexpected situations. Southwest’s point-to-point network also covers an unusually large geographic area, which makes reassigning pilots even more complicated."
"Southwest has generally struggled with coordinating its operations as of late; it had the highest percentage of cancellations and worst on-time performance among the country’s four major airlines in June and July. The Southwest pilots union further blamed the company’s technical systems and processes for reassigning pilots when disruptions occur, claiming that these are long-standing problems that executives have failed to fix for years. The airline has struggled with rerouting pilots partly because it uses a “point-to-point” system, which focuses on flying passengers directly to their destinations. This is opposed to the “hub-and-spoke” model that American Airlines uses, in which passengers are often first routed to a main base of operations before departing for their final destination. While the point-to-point system has the advantage of reducing travel times and the number of connecting flights, it can be difficult to adapt to unexpected situations. Southwest’s point-to-point network also covers an unusually large geographic area, which makes reassigning pilots even more complicated."