To be fair, in the case of Steam they legitimately did try. They supported bitcoin purchases for nearly two years before they stopped, citing volatility and processing fees:
I wouldn't call using Bitcoin legitimately trying. Even in 2017 Monero existed, which solves both the fee and transaction time problems, and as an added bonus is way more private.
It was tried, way back when it started, and it didn't work very well. Maybe a modern blockchain can work better, but the transaction volumes of credit cards are orders of magnitudes above the busiest blockchain today.
