People complaining about Vision, but they really don't understand the absurd Cost-to-Value it has

Old Vision Wards were 75 gold. A gank that secured a Kill would mean at least 300, 450 total gold if there was at least one assist. By being able to deny a Jungler's gank, for a 75 gold investment, you've just denied the enemy team 6 times that much gold. That's not even accounting for Pink Wards, that not only deny a gank, but add in the extra value of more duration should their not be any gank at all.

It could sit there for 5 minutes, and you've just got double the value of a normal vision ward from it, not even then counting the value of stopping one, or possibly many ganks in and of itself.

This is the thing I see most problematic when people complain about Vision getting nerfed. They say it's strategic to be able to deny a Jungler's entire purpose, by buying a ward and placing it in a bush. That can't be denied. But there always come the problem of when something is too strong, or too prevalent that it affects the game itself. Junglers live and die off ganks in the current meta, with Riot disincentiving Power farming in the jungle, and Wards directly affect their entire ability to play their role.

Imagine if for 75 Gold, you could cleanse a CC. Burst mages and maybe tanks become garbage, as any one and their mother start buying it to deny any Combo starter from any mage. What's the point of playing a Burst mage, when your entire job is countered by 75 gold? Mages that don't rely on a single CC start becoming more powerful, as they're not affected as much.

I just don't think it's very earnest, nor worth discussing, when folk seem to push Vision as this "Only makes the game better" ideal, without looking at how it really affects the game as a whole, or just how impactful it really is for the cost. There is a level of vision that is healthy for the game, and while we may all disagree on what's perfect, Vision is incredibly important, and can be game bending.

Final thought: What's better strategy? Being able to flank an opponent successfully for an engage that leads to you winning a teamfight, or you placing a ward in a bush that denies that ability? I think they're both the same, however, one is active strategy, and the other is passive. While one is you making a decision in the moment, the other is you waiting for something to appear for you to react to ahead of it happening.