I think this is true, but the first snowman you build in December will always be perfect (as long as it’s not insanely disproportionate). I got really good at building them but still occasionally get one just off but the first one was always perfect.
Congrats on getting that second one though. There are ways to judge the heights needed for it to be perfect. In time you’ll get to know how big each one should be and should have a lot less trouble.