Why does null propagation inconsistently apply to Nullable <T>?

Question

I specifically draw attention to zero propagation, since it also applies to the bool?use of the return method bool. For example, consider the following:

public static bool IsAttributedWith<TAttribute>(this JsonProperty property) 
    where TAttribute : Attribute
{
    return property?.AttributeProvider
                    .GetAttributes(typeof(TAttribute), false)
                    .Any();
}

This does not compile, and the following error exists:

Can't implicitly convert bool? cheat. Does explicit conversion exist (are you skipping listing)?

This means that it treats the entire method object as bool?, so I could assume that after .Any()I could say .GetValueOrDefault(), but this is not allowed, since it .Any()returns boolnot bool?.

I know that I could do one of the following:

public static bool IsAttributedWith<TAttribute>(this JsonProperty property) 
    where TAttribute : Attribute
{
    return property?.AttributeProvider
                    .GetAttributes(typeof(TAttribute), false)
                    .Any()
        ?? false;
}

or

public static bool IsAttributedWith<TAttribute>(this JsonProperty property) 
    where TAttribute : Attribute
{
    var any = 
        property?.AttributeProvider
                 .GetAttributes(typeof(TAttribute), false)
                 .Any();

     return any.GetValueOrDefault();
}

or

public static bool IsAttributedWith<TAttribute>(this JsonProperty property) 
    where TAttribute : Attribute
{
    return property?.AttributeProvider
                    .GetAttributes(typeof(TAttribute), false)
                    .Any()
        ?? false;
}

: .GetValueOrDefault() .Any()?

public static bool IsAttributedWith<TAttribute>(this JsonProperty property) 
    where TAttribute : Attribute
{
    return (property?.AttributeProvider
                    .GetAttributes(typeof(TAttribute), false)
                    .Any())
                    .GetValueOrDefault();
}

, , bool? , bool.

Answer 1

?. . , :

property?.AttributeProvider
         .GetAttributes(typeof(TAttribute), false)
         .Any()

property==null ? (bool?)null : property.AttributeProvider
                                       .GetAttributes(typeof(TAttribute), false)
                                       .Any()

GetValueOrDefault():

property==null ? (bool?)null : property.AttributeProvider
                                       .GetAttributes(typeof(TAttribute), false)
                                       .Any()
                                       .GetValueOrDefault()

, Any() bool bool?. , :

(property==null ? (bool?)null : property.AttributeProvider
                                        .GetAttributes(typeof(TAttribute), false)
                                        .Any())
                                        .GetValueOrDefault()

, , ?.:

(property?.AttributeProvider
          .GetAttributes(typeof(TAttribute), false)
          .Any())
          .GetValueOrDefault()

Answer 2

GetValueOrDefault Any(), bool. , .

 return (property?.AttributeProvider
                .GetAttributes(typeof(TAttribute), false)
                .Any())
                .GetValueOrDefault();

, , , , , , , null. , , - ( ).