Why is it relevant whether it brings down an airliner or not?
If a drone goes through an engine, that may be catastrophic, or it may just cause damage. Why is it acceptable that commercial aircraft, or GA, receive damage because someone wants to upload more footage of their drone flight to YouTube? Why should easyJet, for instance, have to pick up the tab for engine damage after ingesting a drone?
Also, the comparison to wildlife is hard to justify. One is a wild animal, whereas drones are piloted by humans who should be capable of understanding that driving your drone all over an airport, or at altitudes, to promote your awesome YouTube channel is a selfish act. There's a YouTube video of a drone at altitude where the poster claims they checked Flightradar24 before the attempt. That about sums up the idiocy.
Let's not pretend that the threat is coming from commercial drone operators. It's the types of numpties who force you to sit through their un-edited honeymoon photos (you know who you are folks) who are now trying to justify access to restricted airspace for personal vanity.