"It's easier on your shoulders if you don't use a full ROM when you bench."
This isn't an accurate statement.
It really depends on the person's arm length, shoulder width and chest depth.
The first 1-3 inches are the hardest part on the bench press, but I still think you should touch your chest. Best thing you can do is really learn to improve your bench technique to overcome this and still get the fullrange.
Bench technique:
retract shoulder blades
grip barbell tightly
get a big arch
tighten your ass
pull your legs back and outwards until you feel tension in your hips and ass and everything feels locked tight.
then point your toes inward and then while pushing your feet into the ground, corkscrew them outwards, now you will feel REALLY tight throughout the whole body, especially the hips and ass
BIG breath into chest
then tighten stomach which will lift your chest higher and further tighten you up
unrack
lower barbell moderately slowly to nipple line or lower pec, do not bounce the weight off your chest
now explode the weight up, if you set up properly your body will be really fucking tight and this is where that really comes in handy at least to me
as you explode the weight off your chest, push hard into the ground with your legs which will help you drive the weight up those initial 1-3 inches
it also helps on heavy attempts to not only squeeze the barbell hard, but also to imagine pulling it apart from the middle as you drive it up with the leg drive. This activates the triceps even more.
rack the bar
If you do all this you will have great technique and if you can manage to do it all together you will be amazed at how tight, strong and stable you feel on heavy lifts.