It was never a priority in any team I worked for. Making the car as fast as possible gives the best results, trying to mess up the others behind is not needed if they can't catch you. Thinking about doing this is sort of admitting that you are going to be a bit crap so need to keep better cars behind, which is also pointless since they will probably qualify in front of you so never need to overtake you (now the tyres are consistent)
In fact sticky tyres are just as much a hindrance to overtaking as aero (by simulation and track experience) but drivers like using them
Think about it, the aero doesn't change all that much in the rain and the grip is less than half. If more grip helped overtaking wet races would be the most boring processions of them all.