Why should I publish an ASP.Net Core project to deploy on another machine?

[ekr1362]

I have a completed project created by ASP.Net Core 3.1 on my PC using VS 2019 on windows. Let's call it "Main Project". and I can publish it to a folder target framework will be .NetCore-3.1 and target runtime will be Linux-64, let's call it "Published version"

I have a virtual machine "Ubuntu server" as my localhost. And this is my question: Why should I upload Published version to my server and run it , while I can upload complete main project and run it on my Ubuntu server successfully without any publish? Only some codes are different like "dotnet run" vs "dotnet Myproject.dll" but the code works truely in both cases.