[EXAMPLE] Use of WithActiveSpan() is confusing

In the provided http example, the server does the following upon reception of a client request:


{
  StartSpanOptions options;
  options.kind  = SpanKind::kServer; 
  ...
  auto new_context = prop->Extract(carrier, current_context);
  options.parent   = GetSpan(new_context)->GetContext();
  ...
  // start span with parent context extracted from http header
  auto span = get_tracer("http-server")->StartSpan(span_name, {}, options);
  // mark the span as active
  auto scope = get_tracer(‘’)->WithActiveSpan(span);
  ...
  span->End();
  ...
}

I can hardly figure out why the span is created, then explicitly activated. I would expect something like:

{
  ...
  // start span with parent context extracted from http header **and make it the active one**
  auto scope = Scope(get_tracer("http-server")->StartSpan(span_name, {}, options));
  ...
}

Ok, one could argue that there's now no way to explicitly End the span. Ok, but why not simply add an accessor to the underlying Span to openTelemetry::trace::Scope? Something like:

{
  ...
  // start span with parent context extracted from http header **and make it the active one**
  auto scope = Scope(get_tracer("http-server")->StartSpan(span_name, {}, options));
  ...
  scope.Span()->AddEvent(...);
  ...
  // if really required...
  scope.Span()->End();
}

Would that violate a design choice or the Scope paradigm?