It is important to know that for any project hoping to convince investors into putting their money into the project, they are going to be focused on making the project as appealing as possible which means that the project's whitepaper will surely be good so I believe you should look beyond the projects whitepaper to decide if a project is legit or not.
Always make through research of a project's team, road map and token metrics to decide which projects to invest in
actually whitepaper doesn't guarantees the project gonna be successful because they have alot designers whom configure whitepaper very well and websites, the only thing we need to do is to do more research in any project we are to invest on. i have seen a project with a well designed sites and whitepaper yet don't meet there softcap so the project was postponed till further noticed.