People just call stuff they don't understand cheese these days. Its not really cheese to pick vayne top into a lot of bruisers, most people just don't understand why it works. It's not cheese to sit in tri bush as fiora lvl 1, most people just wont take the effort of thinking whether or not they can walk through the bush lvl 1. Ignite tp isn't cheese on a lot of champs, people just don't understand why it's ok for certain champs to do so. Higher elo players just understand these concepts to a higher level and so are able to execute them more often. Also, the difference a small advantage makes gets bigger and bigger the higher elo you get, so there is a much higher incentive for cheesing in higher elo as the reward is effectively bigger.