You really gotta count how many cheap boat Ukrainians lost trying to sink 60 ships. Ofc they (suicide boats) are much, much, much cheaper and cause no crew casualties being remotely controlled. So it is super cost effective, And most importantly safe, but if you count pure numbers i am sure Ukrainian losses of those boats are massively higher.
But the fact that russians can still use their missles ships to launch missiles is a big issue. Even if there are fewer of those ships, its not 0 :(… Yet