And of course, yes, the company may say "we're spending our money to buy this for you, don't worry" the truth is money is money. Someone (company or you) is buying the option early, thus having less money to spend on other things.
Alternatives could be the company pays you that money, so it's yours to spend as you see fit. Including, someday, buying the option if you want.
Hope that helps!
Ignorance in the case of not knowing it can be done - many "startup" lawyers are operating with a playbook written in 1996.
Cash conservation in the sense of "holy schmoly I'd have to pay $X,XXX upfront in taxes to cover their option purchases???"
And "justice" in the sense of "well I'm taking a personal risk as a founder, so if you're not all in with me then suck it and your options will just go back in the pool when you quit."
My (very basic) understanding is that this works fine early on, but once a company reaches a certain size & valuation it becomes hard to continue.
Mostly because they don't have experience with option plans, and lawyers tend to recommend what's best for the company (not what's best for the employees).
I granted my early employee founder's stock (same as mine), mainly because I was screwed by stock options in the past. But I had to actively request this from our lawyer (the default is for lawyers to suggest stock options).