Mac horrible at compressing/zipping files

Is it me or is Mac still in the early 90s when it comes to zipping up files? I can do a basic compress by highlighting several files in the same directory, right-clicking, and selecting 'compress'. Ok, that's what I'd expect. But let's say I want to add a file to that existing zip file? I can't just drag n drop a new file on top of the zip file and have it added (something that has worked in ugh, Windows, for about 10 years). I even use Pathfinder which doesn't add the feature, either. Is there some OS snap-in that will get my otherwise state-of-the-art OS into the 2000s?