To express and represent your point of view.

The surveyors may not want to represent/hear about the interests of people too bothered to do things that take time without pay (e.g. voting or vaccination, which should also be paid imo).

That's rather conspiratorial. Not all polls are created equal.

If you wonder about a poll's integrity you can read about their methods, e.g. Pew research,

https://www.pewresearch.org/methods/u-s-survey-research/our-...

Vaccination does pay, in kind.

The company doing the poll will often misrepresent themselves IME.

"Do you have a minute to talk about your phone service, we're calling from your provider."

OR

"We're finding out for the government about voter preferences."

That sort of thing. People thing they may have an obligation to the company.

UK government do a paper-based survey of businesses for which there is a legal obligation (backed by a fine) to respond, but it appears when you first get it just like one of these scammy polling companies.

I guess some people enjoy sharing their opinion. Not everybody does, some people just hang up.

The main market polling company around here does pay out; usually a 5€ voucher.