Pretty much. One of the advantages overweight people have if they want to start exercising is they’re literally doing resistance exercises all the time they’re moving due to the extra weight they’re carrying. Over the last few years I lost 25kg, the equivalent of a large sack of potatoes.

With shortened range of motion yes. And probably bad form.

Also, how would you press without the shoulders? https://youtu.be/x4O0WzWWpd0