Tightening the strut bolt doesn't put pressure on the bearing... From the size of the bolt and the thread pitch, it is all you need.
Mechanic's salary is based on their speed... so rat-a-tat. Done! Same for lugbolts... rat-a-tat done! The reason is because they live on time game... flat rate book said that is all they get paid... they want to beat the time as much as possible. If they can do it in 1.5 hours, the extra 1.5 hours is bonus for them... until they hit a doozy job that takes them far longer than flat rate allowed... sometime by 2 or 3 times longer.
That is why they are quite picky on what job to accept when they are busy.