"A force majeure event also gives the NBA "the right to terminate" the collective bargaining agreement 60 days after delivering a written notice of termination to the NBPA."
These are the top contracts in the NBA and are currently GUARANTEED. If the players don't play that money is gone. Most of the dudes at the top are 30+ in their primes. The majority of them will not get that same money if forced to re-negotiate.