The point of surge pricing is to rebalance supply and demand when demand for rides outstrips supply of drivers, whether by attracting more drivers or by discouraging price sensitive riders.
Some riders at the airport will strongly prefer Uber, for whatever reason, so they're less price sensitive than you. Because you're happy to substitute an Uber for a taxi, you decrease the demand as a response to the surge pricing, preserving the limited supply of drivers for the riders who really want them (or are at least are price insensitive enough to pay for that privilege).
The point of surge pricing is to rebalance supply and demand when demand for rides outstrips supply of drivers, whether by attracting more drivers or by discouraging price sensitive riders.
Some riders at the airport will strongly prefer Uber, for whatever reason, so they're less price sensitive than you. Because you're happy to substitute an Uber for a taxi, you decrease the demand as a response to the surge pricing, preserving the limited supply of drivers for the riders who really want them (or are at least are price insensitive enough to pay for that privilege).