There's nothing wrong with drawing a distinction between claims of fraud that result from nothing more than dissatisfaction with the outcome, and claims of fraud that arise from some actual evidence of possible malfeasance. Dismissing the former outright is necessary in order to give the latter the attention they deserve.
In general, if you want people to have confidence in an election, you need to take seriously claims of fraud and investigate them openly.
To flatly call them "misinformation" and advocate for further censorship of people making the claims does not give confidence, to put it mildly.