I can totally understand why some of our skills require us to stay put for a bit. Oftentimes, what we are doing during the induction is preparing the skill. (The animation shows that we read from a tome, while thrusting our staff into the air, and summoning the alien-photon beam from the sky to smite our orcish foes, for example)
However, some skills lack inductions, and some of these can be cast "on the move", while others must be used firmly planted in place for anywhere from 1-3 seconds.
For example, all the "Signs" skills can be cast while running, but none of the "Lore" skills can be used unless you stay put. I don't quite understand the reasoning behind this, but I pose the question: why can't all skills lacking inductions be used while moving?
N.B. I am not talking about skills that normally require an induction, but lack one in special circumstances (through something like Coordination). Nor am I talking about skills whose induction is reduced to almost zero (like Beacon of Hope fully traited).