I disagree for the reasoning of the majority that are against you as well.
Throughout the years we haven't even tapped the full potential of dinos. As Bert mentioned, it's been years and tusos/basilos still haven't gotten near their maximum potential. We're barely starting to reach the finish line with regular rexs. Just because you wan't to play on a PVP server does not mean everyone else must have their hard work deleted.
Also, do you know how many people will quit if that happens? Imagine you're a breeder and you worked your tail off building up a female population of 300+ to work on mutating your rex line to make it stronger and be able to demolish bosses. You're able to do this in Single Player as well mind you. You spend years building up your rex line just to have some new kid come along and tell you that your hard work is unfair and that you should start from 0 again because he's new to the game and dislikes your progress. WUT?
tldr
Join an Unofficial server that wipes regularly if you want that, stay away from Official servers.