Maybe people prefer to come up with something themselves, instead of just slavishly copying what won.
No they don't. People want to win and will in most situations shamelessly copy a winning list.
I think that in this game you'll have people that aren't netdecking end up running the same lists. While there is a huge number of possible lists that can be built with 100pts. many combinations are just obviously better than others especially if you are taking into consideration what you expect the meta at a tournament to be.
I see people on the forum referring to Sideslip's Dash or Theorist's Dash but these are combinations that anyone who understands how the cards work and have similar goals would have probably hit upon. Naming a build combo after someone who was an early (and visible) adopter makes a lot of sense because it makes it easier to communicate if there is a common way to refer to it.
There are very few people that will end up running truly unique lists because most ships have a relatively small number of upgrades that make much sense to take competitively and not because everyone that plays is a dirty netdecker. Even if you netdeck in X-Wing you still need a lot of skill to pull off tournament wins. I love KineticOperator's Six Sigma list but can't for the life of me fly worth a ****.