In principle: yes!

However, with some technologies (such as Silverlight and .NET, but also Flash) you can't help but wonder if maybe the world would be a better place without them.
Also, Miguel de Icaza as a person is, well... let's say "highly controversial".

So as somebody who regularly disables Flash (or doesn't install it in the first place), my personal opinion is it would not be nice to have Silverlight on the tablets. Therefore, I will not go there and ask for support on this platform.

In the end, though, you're right (as always ). It's good to have more options, as long as one of these options is "disable".