Excellent question. They may not intend, today, to pay dividends. However, the same question could have been asked about the successful tech companies of the '00s. Companies don't like to start paying dividends until they are fairly certain of their future profit stream and therefore ability to continue paying (and increasing) the dividends in the future.

Apple, Oracle, Nvidia, Cisco, Alphabet, Meta, Salesforce, and Qualcomm all pay dividends now. It's not unreasonable to expect Uber and Tesla to pay in the future. However, the median time after IPO for similar companies to pay a dividend is close to 20 years. So we could expect Uber to perhaps wfstart paying sometime around 2039. Tesla...is Tesla so who knows?