No one has increased their wealth because of savings account percentages.
Agreed, but we're talking about having emergency funds that requires high liquidity, and putting them in HYSA, not your typical 0.5% bank savins account. You really wouldn't want to tie your emergency funds to the stock market as the market is volatile in the short term, and you pose a real risk of needing to withdraw funds during a downturn.
If that's where the majority of your funds are located, you're wasting the money's potential.
We're just talking about emergency funds, not an entire portfolio.
Agreed with the rest of your points, though not sure where they come from.
from Middle English, an obsolete term: https://www.oed.com/dictionary/disclude_v?tl=true