In what way is BTC "stabilizing energy grid" ? ELI5

I've heard this statement a lot, but I don't see a fundamental reason for why it would be true. The only thing I can think of is that people are trying to find cheap ways to power their miners until it's not economically viable anymore or that there's a better usage for the same found power.

So far these are the answers, that I've found helpful:

Answer 1: Power companies can create bigger facilities that produce more power because they can recoup the cost by mining BTC when the demand is low.

Possible problem with answer 1:

However, what happens if BTC price goes to the moon? How can you afford using energy when it's more profitable to mine BTC? This is assuming we are still living in FIAT world. There needs to be a contract between the miner and the power company that prioritizes the energy consumption of the masses of people over the mining.

Answer 2: Be better off storing it in a battery or pumping water uphill or heating salt, etc