"If you manage one every thirty minutes, you'll be doing well."
If they really were that rare I'd consider that I was doing well. However, I can spot them all the time. Once I allow my eye's to dark adapt, I can normally see them every few minutes. And before star link, I could even see several at once. Admittedly, I've not had the displeasure of starlink wrecking an image of mine yet, but I think that has more to do with bad weather than anything else.
Oh, and for the record, it's common to be taking images of the same part of the sky for several hours at a time. So having the odd satellite coming through is part of the course. Having a huge trail of them coming through over several hours is what is going to cause the problem. One here an there is ok, but from what I've seen of Starlink images so far, it looks like it's anything but that.