I don't think disabling surge pricing is a show of solidarity. With Taxis striking, surge pricing would have skyrocketed. This feels more like Uber just wants to preempt an inevitable news story about how surge pricing hit 10x or something during the taxi strike, which would be bad PR.
The article did say that Uber is working with its affected drivers to provide legal assistance. So, again, they're just protecting themselves. The company has practically no moral compass.