Only in the US. In my neck of the woods(Europe) people ridicule that obsession of fake displays of patriotism in US sports. I've been a fan of multiple sports and I cannot think of a single one in a any country other than the US(and Canada?) that plays the national anthem before games of club teams. The only time they play the anthems is before national teams competitions/games/events.
Actually, I think they're trying to appease both sides. You can still protest by not going to the field for the anthem. But it keeps people from getting upset over the kneeling and should help save their ratings this fall.
Pretty sure Luck said he didn't anticipate throwing openly before training camp. I always figured he'd start his throwing regimen behind closed doors, and by training camp he expects to be ready to go.