Yes this is the impression, same as from the police conference.
She seemingly disappeared without a trace, and that might point to good planning, but I don't know if the same result could not be possible for a random/opportunistic attack, for a perpetrator who knows what they are doing and may have done it before.
I still favour the targeted attack myself though, especially if more that one perpetrator involved. Also maybe the police investigators have info that they have withheld from the general public that further substantiates a targeted attack.