I don’t understand what the big deal is. If you don’t like easy questions, don’t answer them. Or vote them down. Are you offended that some novice asks what a subnet mask is? As others have pointed out, one person’s curve ball is another’s slow pitch (just to keep the baseball metaphor going). The more you know, the more things that will be easy for you.
There will always be more novice questions than difficult ones. It’s a simple fact that there are far more novices than experts. That is true for whatever field you’re in. It’s always lonely at the top.
Experts need less help than novices. For example, take the top dozen members and see how many questions they ask here. It’s not that experts don’t have problems, but they have more (and better) resources to answer them. Speaking for myself, I run into difficult problems all day long. But between vendor support, colleagues, or even a well-constructed Google query, I can get a more reliable answer than SE.
Presumably, we’re on this forum to help people who don’t know as much as we do. Personally, I have taught beginning networking classes and I like helping new students understand the basic concepts. Seeing someone “get” bridging is more satisfying (to me) than discovering why a line card doesn’t support some feature with a particular code version.
One more thing: practically speaking, how would you limit “T-ball” questions? Have a close option that says, “Welcome to Network Engineering. Unfortunately, your stupid question is beneath our dignity for us professionals to answer. Come back when you actually know something.”? This is a public forum, so the public in all its glory, is going to ask questions. Most of them will not be about some intricate MP-BGP routing issue. As I said, if you don’t like the question, vote it down.
If you really want a forum where only “professionals” ask “professional” questions, you should create a closed forum where “professionals” have to qualify to get in. Or, you could always get a job with Cisco TAC.