It does matter how he got the concussions. If he is getting concussions because his QB is throwing him hospital balls, then he is far less likely get a concussion if he has a QB who doesn't put him in dangerous situations.
Yes, he is more likely to have a serious concussion if he gets another concussion than other players, but the way Maye is playing, he doesn't put his receivers in position to take unnecessary shots to the head. And Olave isn't a WR who lives on running in traffic over the middle.
He isn't a RB or a LB or QB who either hits a lot or gets hit a lot hitting head on. As X WR, he is usually going out of bounds or getting pulled down from behind and not getting hit with a guy coming at him full speed. It happens, but far less than other positions. I think it is less of a concern for him than other positions.
In all reality, we probably should be more concerned about the concussions that Maye has been getting than Olave's concussions if the Pats traded for him. Maye plays a position and plays a style that will open him to far more chances for more concussions.
And I don't think Olave will command that much in a trade. Maybe a second rounder at most. And Olave has his fifth year option.
But then again, I am not sure if I even want them to trade for Olave. I just don't think the concussions could be as big of a concern as people make them.