There are so many different ways to build a champ : people should try different builds
Even if it not always works trying new non conventionnal builds in normals is refreshing and fun. If you think lol has became boring try new things.
https://matchhistory.euw.leagueoflegends.com/en/#match-history/EUW1/29922274?champion=17
Teemo for example :
Speedmo Tankmo Suppmo Burstmo Etc...
Veigar tank or veigar adc :
https://matchhistory.euw.leagueoflegends.com/en/#match-history/EUW1/29922274?champion=45
There are so many possibilities even if they don't always work.