I don't get what you're saying here. If I get granted 40k options and they vest in 12 months, that's a lot better than 40k options that vest in 48 months. I have 10 years to exercise them in either case, so 10 years to get my upside, right?
Let's say one company offers you $400k of equity vesting over four years. On your start date, they'll use the current price of the stock to translate that into a number of stock units (RSUs, typically), and then you'll get those stock units according to your vesting schedule. Let's say, for ease of calculation, that this $400k translates into 480 RSUs. So you'll vest 30 RSUs every quarter (let's ignore a cliff). If the price of the stock is rising, the 30 that vest in those later quarters will be worth more than the 30 that vested in your first quarter. Your last 30 units will be worth _a lot_ more than your first 30 units.
Now let's say a company offers you $100k for your first year, and promises to refresh you another $100k each year thereafter. Your first year, they give you 120 units for the $100k. But your second year, the stock price has gone up, so $100k doesn't translate into 120 units anymore; it translates into maybe 100 units, or 80 units. Your second year, the stock price has gone up even further, and $100k translates into even fewer units. Likewise your fourth year. These per-year refreshes "reset" the value back at $100k each year, when a four year refresh would "accrue" more value, year over year, if the stock keeps going up in price, which tech stocks typically do.
For a concrete example, at a former employer (GOOG) I was granted $150k of stock in 2019, vesting quarterly over four years. When I left in 2021, the value of the remaining shares of that grant was...$155k! The stock had more than doubled in price from the time of the grant, but it was still vesting according to the _original_translation from value to units. So the unvested value of _half_ the grant units were worth _more_ than the original grant, even after I'd already vested half the units.
If you calculate the number of shares determined by the price when you join you're locking in more shares earlier. If you are forced to negotiate that each year then you lose the growth you would have gotten from locking in the cheaper shares earlier - and that's where the vast majority of growth exists.
Imagine you worked at Tesla and joined at $250/share and five years later it's $2500/share. If you locked in 5 year vesting at $150k/yr calculated at the $250/share mark then in year 5 that's now worth over 1.5M a year!
If you're forced to renegotiate every year there's no way they're going to grant you 1.5M worth of shares for another year (unless you're pretty high up the chain).
It screws employees from capturing that growth. It's framed in a twisted way as employee favorable because in theory if you were granted 5 years worth of equity in 1 year it would be better, but nobody is doing that.
Same thing can happen with RSUs, those are usually granted based on price. 4 year vesting of $100k worth of RSUs could be worth significantly more than $25k worth of RSUs granted with a one year vest each year for 4 years.