The last way white lends aid to your mana base is by helping you tutor (search your library) for lands (often Plains cards), and adding them to your hand
Most of the time, we see a rock-paper-scissors metagame filled with aggro-midrange-control matchups, as opposed to the aggro-combo-control matchups we read and hear about when beginning to learn Magic theory. However, this is not to say that there have not been competitively-viable combo decks in Standard as of late
Still undervalued in my opinion I think what @salaryyy said is correct
You will need ramp early, and theres plenty of it to be had
As such, it doesn't hurt the game of Magic that these sorts of collectables exist, because if it doesn't interest you then you can opt out, and if you're lucky enough to open one then cool, you can sell it and buy many versions of the plain game piece
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