They make more money off of one international game then they would with a home game. The NFL knows what it's doing don't worry about the money they make.
TBH the owners already have this worked out so it is a non issue
Every chain restaurant I ever worked at the manager was the one who had to clean the bathrooms. They wouldn't let the employees clean them said it was a health risk if you were handling customers food. This was about 15 years ago.
The NFL wouldn't be talking about it and pushing so hard if they thought it would cause a lockout. They have been negotiating with this for a while it will happen, don't see a lockout.