I definitely get why, but people have been paranoid of interacting with bots, shills or astroturfers for as long as the internet exists. Calling someone either of these without asking to elaborate on their comment is just adding to the polarisation and intolerance of our platforms.
Often when I try to talk to people with wildly different opinions they just come back with those insults because “who can ever disagree with my opinion? They must be trolling.”
So I definitely blame people for jumping to the wrong conclusions.