should be channeled into Bitcoin economy
Oh! Is that necessary? I mean, what most people normally find is convenience. Especially to places that don't widely embrace Bitcoin just yet, like in small provinces. I guess promoting Bitcoin should be enough to contribute to the crypto economy, you don't necessarily need to spend every transaction in Bitcoin just to show your support, and that is why exchanges exist to bridge the inconvenience. Exchanging your Bitcoin to fiat and vice versa is one way to contribute to the crypto economy, it's not just Bitcoin-to-Bitcoin transactions. After all, Bitcoin needs liquidity.
The OP seems unaware that the world doesn't work that way—putting forward an idea on a forum and telling everyone to follow it. Bitcoin is hardly used as a medium of exchange these days, as evidenced by the low transaction fees. Nor do I see many more places to spend my Bitcoin directly than I did 5 years ago, for example. What we do see is that it's much easier to convert Bitcoin to fiat, and there's much more centralization.
The problem is that Bitcoin has shifted from its original concept as a medium of exchange—P2P cash—to that of “digital gold,” a term that has gained popularity in recent years, meaning it’s more of a store of value. However, it doesn’t seem to be performing very well as a store of value lately. We’ll see what the future holds.