Flex 4 - CSS type selectors in MXML components

Does anybody know the reason why CSS type selectors cannot be used inside MXML components, and/or a trick to make it work?

I see absolutely no reason for a such simple functionnality not to be supported, and I'd really like to understand.

After all I read about CSS in Flex 4 being so much better than in Flex 3, I find myself quite disapointed when I'm forced to repeat myself, addding the same parameter to all my buttons...

    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        .sampleStyle {   color: red;   }        
    </fx:Style>

    <s:Button label="1" styleName="sampleStyle"/>
    <s:Button label="2" styleName="sampleStyle"/>
    <s:Button label="3" styleName="sampleStyle"/>

...while I could simply use a type selector and keep my MXML code a lot cleaner and readable.

    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        s|Button {   color: red;   }        
    </fx:Style>

    <s:Button label="1"/>
    <s:Button label="2"/>
    <s:Button label="3"/>

I didn't found any information on this issue (apart from Adobe documentation which basically just says "that's not possible"), but I'd really like to know the reason behind this.
Is there something I don't get, or are these selectors actually totally useless?

ansaurus

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Flex 4 - CSS type selectors in MXML components

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