I think the LIV players have come to realise that their time at the peak of the sport is limited, and if they aren't at the peak on the PGA, then the opportunity to earn the big $ is pretty limited on the regular tour. In some ways, they'd be mad not to take the money on offer from LIV, especially at the sums being rumoured to the higher ranked players. Whilst we like to think they are there "for the good of the game", they all have futures to think about, families to support now and in the future etc.
As for the golf format itself, I've watched a handful of minutes on youtube, I could take or leave it, but at least they've tried to offer something different, 3 rounds not 4, shotgun start & teams, almost like they are trying to emulate Ryder Cup (will wait to see if they do go down the whole teams 4ball, match play etc).
The spectacle of LIV and the commotion it has caused has undoubtedly damaged the PGA, as has the PGAs them or us protectionist approach, but the PGA has spent years and millions of $ building up the sport of golf into a marketable commodity, to then have an outside organisation come in over the top and benefit from that investment has to hurt.