We all do. It’s human nature. That doesn’t change the fact that people are ignoring how many democrats work to obstruct the republican primary and also routinely lie about “what they will do if..” People know how pre polling is used. There is no risk whatsoever in lying as a means of influence. The vote does not actually count. Same goes for pollsters. They have long ago figured out how to manipulate outcomes.
The media, too. Take for example what they did during the general election in 2000. They called Florida for Gore before the polls closed in the panhandle. They then called many states for Gore early while holding out as long as possible on the states trending Bush. Then they called the entire race for Gore. Many suppressed votes were the result. Florida panhandle voters may have not headed to the polls once they learned their guy had already lost. There are more conservatives there. On and on.
To not be suspicious is to be willfully blind.