Are you really comparing BTC SHA256 and LTC S-Crypt hashrate 1:1?
If such a comparison is desired it should be done based on energy used by the hashing for each algo respectively.
That just makes the difference between BTC and LTC/DOGE even greater...
Here's another way of looking at things. As of Sept. 2021, in terms of energy consumption per transaction:
Bitcoin: ~707 KWh
Ethereum: 62.5 KWh
Dogecoin: 0.12 KWh
BTC is a beast in energy consumption compared to ETH, and ETH was a beast compared to DOGE... no reason for DOGE to switch to PoS.