People have the whole progression of this badly mixed up in my opinion.
You have to become a store of value first. Then you become a currency. You don't put your day to day financial needs into something as weedy and volatile as Bitcoin currently is. And layer two stuff may well solve the cash aspect. We'll have to see .
There's a lot more ground to cover. 'Cash' is the final progression, not the first.
Just to give a confirmation of your statement - it can be said we see the same with BTC. On the Pacific Ocean, there is one small state - called Vanuatu. Their traditional currency (and even you can find it on the flag)...is a boar tusk.
For many people, a boar's tusk has a very small value. But some of the locals found it very valuable and instead of breeding boars for food, they started breeding them for tusks and kept feeding them (any analogies between mining and "wasting electricity"?).
The older the boar, the more circles its tusks had been making and the more problematic, costly and time-consuming it was to feed it (halving, rising mining difficulty and effect on the price of BTC).
Finally, the boar tusks became something more just mere store of value - became a local currency, a symbol of wealth with great reputation (now BTC is a store of value thing, right?)
But anyway, it is nothing but a piece of bone, just as BTC is just a piece of code, right?