I guess I'm missing this, but what incentives the IOC can provide the LA2024 committee? Reduce the demands on the LAOC for hotels and similar? They were ready to accept and run the games based on the current requirements, so I'm not understanding what benefit they can get from saying "we'll sit out for an extra 4 years".
I'm sure the Trump election and his policies are driving some of this discussion but I think it's just Paris using the olympic housing availability as their "bluff" (not in that it's not really an availability issue but more that there is no other option available for 2028 if they lose) and the IOC has decided to not call them on it and also try to prevent having a 2028 race with no real bids.
Lastly, I'm not buying the whole "it would help the movement to have the games back in Europe again". Look at the recent fames and continent impacted in the 40 years before 2024, and also how many Winter games hosted since they would also help keep "the movement" fresh in the public's mind:
Europe - Barcelona ('92), Athens ('04), London ('12) - (5 Winter games in this time, I gave them Sochi which could also be argued as Asia)
NA - LA ('84), Atlanta ('96) - (3 Winter games)
SA - Rio ('16) - (Nope)
Asia/Oceania - Seoul ('88), Australia ('00), Beijing ('08), Tokyo ('20) - (3 Winter games)
If the IOC considers a 12+ year gap as an issue for Europe, then a 28 year gap in North America is ridiculous. I know that there are reasons for why the US hasn't had a winning bid since Atlanta (the revenue sharing problems, international backlash to the Iraq war, general sense that the US has had enough olympics, etc.), but if the entire Olympic Agenda 2020 movement is about holding realistic games that will not bankrupt cities or leave them with venues that are left to rot afterwards, then LA should be seen as a stronger candidate.