I don't think you understand how Source's optimization works as well as you think you do. I don't say that to be mean, I'm just being completely honest with you. You're making a lot of basic mistakes and seem to believe some incorrect things about how Source itself works and how you should optimize your levels to fit the .bsp format as a result.
If you've never read this guide on Source optimization before, I highly recommend it.
I'm also not sure why you seem to think that Valve doesn't know how to use their own engine properly? They made the engine, and they designed how everything in it functions. I would follow their example. I've been doing this for nearly a decade, and many of the people who have responded to your posts have official maps in the game. I promise we know what we're talking about, and deserve to be taken seriously.
If you've never read this guide on Source optimization before, I highly recommend it.
I'm also not sure why you seem to think that Valve doesn't know how to use their own engine properly? They made the engine, and they designed how everything in it functions. I would follow their example. I've been doing this for nearly a decade, and many of the people who have responded to your posts have official maps in the game. I promise we know what we're talking about, and deserve to be taken seriously.