For me, there's nothing like being able to search for "brown dog" and get all the photos of my dog back. Not to mention all the other things Immich has that make managing a library pleasant.
I not only urge you to try it, but to buy the "supporter" pack, Immich really deserves it.
A problem, but also way better than the solution “just look at every photo” you had without that image search feature.
I think these manual tools tend to prefer recall (“make sure you return all the photos asked for”) over precision (make sure you only return photos asked for”) because of that.
(Likely with exceptions for search terms such as “gorilla”, where surfacing photos of people with black skin is a big no-no)
I had a bunch of photos in Apple Photos which did that sort of thing. As a library management tool it's probably the best out there.
But when you search for brown dog it'll bring back different coloured goats, horses and cows too. This is a problem in a large library.