That's debatable. We got truckers out here well into their 70s. I'm not so sure 70 is old anymore...people who are not even a senior citizen merge without looking. It's got to a point where I drive with anticipation.
Many drivers have a mentality of I have to right of way and don’t watch the merging traffic.. only reason I can see the semi losing control after a Honda side swiped it is the driver was surprised.. I know what’s going on around me the only surprises I normally get is the extreme speeders switching into empty lanes between mirror checks .. i run the right lane often but will speed up a bit or slow a bit to help ease the merge . No point in blocking it because they are stupid and will go anyways .