"Pollsters are looking to get an accurate snapshot of voting intent"
They might be.
I'm not quite so sure about some of their clients.
I'd be prepared to bet they all came up with various questions their people could ask and their clients could choose which ones were used.
Which, along with the who you ask, can make a huge difference to the result.
I'll leave others to decide how much wish fulfillment was involved in some of the polls commissioned by some clients.