Because as the paychecks are missed, the players will be hurting much more than the owners.
This doesn't really go to my point. It's true that the players will be more inclined to come to an agreement once the paychecks stop coming in, but it's also true that making the terms of the CBA even more onerous to the players than what's already proposed, makes a deal less likely. The owners are in a better negotiating position, certainly, but the NBPA is not stupid: they also know what's at stake in the long term as well. There is not just a single season on the table.
If the owners are really inclined to torpedo negotations like that after the games start to be cancelled, this is irrational behavior, and the players never had any "leverage" to begin with. So, I don't believe it to be the case. There will be a staring match to be sure, which the owners will probably win, but I'd be completely flabbergasted if the ultimate agreement was MORE owner-friendly than their current bottom line already is.
The PLAYERS opening proposal was more owner friendly than the current bottom line already is. There is no doubt that the new system will be more owner friendly than the current one.
The question is whether offers after say, October 15th by the owners are moving closer or further away from the center...and I personally believe they will move further away.
And I also think it makes complete sense from the owners standpoint. If this owners make an offer right now, and that same offer is on the table in December, then the offer would actually be significantly worse for the owners, since they will still be accruing costs over the next 2 months, but they will not be getting revenue.
So, lets say the owners offered a 50/50 split of BRI next week, and the players still turned it down. Had the owners taken it, it means they would have gotten 50% of the full $4 billion (or whatever) from a full season, which they could use to pay their expenses, and still have some profit. However, if they kept that same deal on the table in December (with the season resuming in January), it would be significantly worse for the owners, since they will still be accruing expenses over the next 3 months, but would be getting 50% of a smaller pie to pay those expenses. So, instead of getting $2 billion to pay for their rent, front office staff, coaches, etc., they will be getting about $1.4 Billion. So, instead, the owners are going to ask for that $600 million to come out of the players side, and the players are going to laugh at them, because after missing just 2 paychecks, they will not be desperate enough to give in on something crazy like that.
So, the owners will just shut things down. Continue to cut expenses as much as possible, and hold out for a deal that will reimburse them for all of their lost revenue from this season, while setting them up for a new system that puts a lot more money in their pockets in the future.
However, if they can get a deal done before this stuff start happening, the owners will be much more willing to play ball. They will be working from a blank slate, rather than trying to make up cash from lockout losses, and will give the players the best offer they can actually make.