[nickrego]

There are several reasons why you would say "Haaaaaaa", or "Hike", instead of "Strike".

1. 'Strike' is harder on the vocal cords, at loud volumes, than the other words.
2. If you wear a Mask, instead of an HSM, the jaw movement required to say Strike is difficult, unless your mask is ridiculously loose.
3. You were a really bad Ventriloquist in a previous life.

I don't think anybody cares what you say, as long as they know it's a strike (when it actually is).