Clarification on ASP.NET Core integration

[stevendarby]

This guide says to add references such as
<FrameworkReference Include="Microsoft.AspNetCore.App" />
and
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="1.2.1" />

There is a bit more detail about ASP.NET Core integration here -- under an HTTP Trigger section.

My question is: do the suggestions for ASP.NET Core integration apply if you're not using HTTP Triggers? For example, if your function app only has triggers such as [EventGridEvent], [TimerTrigger] or [QueueTrigger]. Although the HTTP types might not be used directly, there may still be some underlying HTTP communication under the hood, which is why I'm not sure.

Perhaps the general upgrade guide (in the first link) could be a bit more specific about why and when the ASP.NET Core references are needed. I am wary that there is an assumption HTTP triggers are always used directly, but I'm not sure.

[stevendarby]

Is there a better place to ask this?