You can always disable the service.
Then you will get angry drivers that cannot earn money because of a choice you made, but you can participate to the strike.
That would have meant forcing other people (their drivers) to strike, and share the economic loss for it as well. Not very fair, don't you think? Being on strike with other people's money?
Yup, that's the short-term drawback. You correctly identified it. Now, contrast it with the long-term drawbacks of not organizing at all.