Netflix never considered Daredevil as a flagship to start a streaming series, House of Cards was. And even that series had a chance to crawl and then walk before the company fully launch another stream of original series by the company. Convention is to allow a new series to grow, and not chop its knees from under it, and then launch another show which will carry the same surname. The Netflix Marvel series was sold as a package, I doubt this was the case at CBS because they would have mentioned it while promoting Discovery.
This is shaping up to be another civil war between Trekfans (Deep Space Nine vs. Voyager) after TNG went off the air. It doesn't show a lot of confidence in the Studio for Discovery when they trump up another series based upon a Trek Legend. Whatever some people are claiming most viewers love DISCO, CBS-- based on their rapid purging-- is implying this is not true. They're breaking the purse to dip into that old well again to something that was widely considered was successful. fireproof78, come on, it's not as if CBS granted a spin-off for DISCO, for whatever it's worth--it appears CBS is going back to the future.
Adding more Trek content to a streaming service is highly unlikely to result in 'chopping DSC's knees from under it'. Streaming does not follow the same patterns as broadcast tv. You can have more than one show of the same source coexist without overwhelming people. In fact, it's arguably better to have more than one show, because it makes people feel like they're getting more value for their money (it's the same subscription either way) and it makes it less tempting for people to subscribe for a minimum period of time, binge and then immediately unsubscribe.