Lyft CEO David Risher defended the company's fourth-quarter results Wednesday, telling CNBC that consumer demand remains strong. "We have record profits, generated over a billion dollars in cash, and that's a result of our customer-obsessed strategy, which just keeps working and growing the company," he told CNBC's " Squawk Box ." "So, love what we're seeing, and really no softness on the consumer side at all." Shares sank 15% Wednesday as ridership numbers disappointed Wall Street. The ride-