ofcourse amateur skill translates into professional skill.
i mean there are obviously diffrences in the scoring so you have to change your style when you turn pro which some fighters struggle with.
but that doesnt mean all the timing, accuracy, footwork, headmovement, ability to block/parry punches, punching form, sense of distance, ability to use angles, coordination etc all of a sudden becomes irrelevant.
it still matters you just have to find a slightly diffrent way to apply it. but to say it doesnt have anything to do with pro boxing is just ignant.
eventually you will have your heart tested too since the pro ranks are tougher than the amateur ranks. but most great amateurs are so skillful they will reach the top 10 before anyone can even test their heart, just on their amateur pedigree alone.
so just bcuz you are a great amateur that doesnt mean you will be a great pro, but it certainly helps.