A blocked static is a perfectly feasible fault. Are we to ban all feasible fault simulations because they will, or might, 'startle' a crew member?
On all the transport aircraft I've ever flown, there were three sets of every essential instrument (as defined by the contents of the standby set). If any essential instrument in any set confuses you, check it against the same instrument in each of the other two sets. The odd one out should be assumed misleading and the two in agreement assumed correct. The exact situation can then be identified and approporiate action (or no action) taken.
Was that explanation startling? Who cares if it was: that's real life; live with it.
(BTW, there's an essential lesson for Boeing 737 Max designers in the above, although you have to wonder how utterly dreadful they surely must be to need it)