This strike is not intended to inconvenience the cab customers (voters!).
They intend to prevent vehicular access to City Hall. A few percent of the cabs will be involved in shutting down the streets at City Hall and if Uber takes up enough slack so the customers aren't inconvenienced that could be helping the cab industry. They don't want pissed off voters.
(Personally, it seems ill advised. The core seems to be the cab companies keeping a 5% transaction fee on credit card processing, which isn't far from the cost. Some cabbies also don't want GPS trackers on the company's cars or LCDs playing advertisements to their riders.)
They intend to prevent vehicular access to City Hall. A few percent of the cabs will be involved in shutting down the streets at City Hall and if Uber takes up enough slack so the customers aren't inconvenienced that could be helping the cab industry. They don't want pissed off voters.
(Personally, it seems ill advised. The core seems to be the cab companies keeping a 5% transaction fee on credit card processing, which isn't far from the cost. Some cabbies also don't want GPS trackers on the company's cars or LCDs playing advertisements to their riders.)