That is a bad trade for Houston and I'm pretty high on guys like Allen and LaVert, but that just isn't enough for a top 5 player in his prime. Even if Brooklyn threw in a bunch of 1st round picks it isn't good enough. You need a guy like Simmons coming back for Harden or it isn't worth doing. And Simmons might very well be available for Harden.
Generally when a team deals a superstar like Harden they want a young player back with legit All Star potential.
Aside from the draft, these are probably the 23 most promising players below the age of 25 (Giannis and Jokic are 25, but won't be traded anyway I assume):
Ja Morant
Tyler Herro
Trae Young
Shai Gilgeous-Alexander
De'Aaron Fox
Devin Booker
Donovan Mitchell
Jamal Murray
D'Angelo Russell
RJ Barrett
Luka Doncic
Brandon Ingram
Jayson Tatum
Ben Simmons
Jaylen Brown
Zion Williamson
Jaren Jackson Jr
Deandre Ayton
Bam Adebayo
John Collins
Domantas Sabonis
Karl-Anthony Towns
Kristaps Porzingis
Not a lot of them available for trade I think, since it wouldn't make much sense for the respective teams.
What do the bolded players represent?
Players on teams that have an experienced supporting cast to make a win-now-move by trading a young (potential) star.
Miami (Herro) has Dragic/Butler/Robinson/Crowder?/Adebayo/Olynyk
Sacramento (Fox) has Joseph/Hield/Bogdanovic?/Barnes/Bjelica/Holmes
Utah (Mitchell) has Conley/Ingles/Bogdanovic/O'Neal/Gobert
New York (Barrett) has Payton/Ellington?/Portis?/Gibson?/Robinson +/or cap space(?)
Philadelphia (Simmons) has Richardson/Harris/Horford/Embiid
Indiana (Sabonis) has Brogdon/Oladipo?/Holiday/Warren/Turner
I think for most teams that have a player on the quoted list above it doesn't make much sense to trade for Harden.
Either because the team is too young or inexperienced f.e. Atlanta/Memphis/Phoenix or since he's a bad fit with another player for instance Dallas (with Doncic while Porzingis is traded). Therefore I don't think that package by Brooklyn is terrible, since Houston will never get back equal value for James Harden.
To neutral NBA fans it would be a golden opportunity for the Celtics if they could trade for Harden by only giving up Smart/Brown + picks and finally getting that superstar to compete. But I'm unsure whether we should do that.
I can see Miami moving both Dragic and Herro for Harden.
why does Harden get disrespected like this? The guy is a top 5 player in the league and is perenially in MVP discussions. He is innovative and creates moves that other player's imitate and here you want to trade him for Dragic and Herro? Are you sure you dont want to add a first rounder from Houston to Miami to complete the total lack of respect?
Houston wouldn't trade Harden for just that, but I'm not sure they'll do much better than that rumoured Brooklyn package.
What is a package you think some team will give up for Harden and makes sense for Houston that goes in total rebuild?
I think there are a bunch of potential trades out there. Phoenix is interesting. They want to make a splash. They have young talent. I mean would they move Booker, as an example. What about Sacramento? They too want to make a splash and have lots of pieces. The Hawks seemingly want to try to win, I think they'd both consider some combination of Collins, Hunter, Huerter, Reddish, 6 for Harden (the Hawks have the cap room to absorb). Obviously those are risks as Harden probably doesn't move them into contender status, but they would be a lot better and sometimes that is enough. The trade that I keep coming back to is, Simmons for Harden. I think that makes a lot of sense for both teams. On some level I think the Bucks would move Middleton for Harden. Not sure Houston would do that as the primary piece, but Middleton is a very good 2-way player signed long term and still in his 20's (and the Bucks could provide other salary relief if the Rockets wanted out of someone like Gordon).
If Harden is really available, teams will come out of the woodwork. Heck I could absolutely see Boston be willing to move Brown to acquire Harden (I think something like Brown, Smart, and Poirier gets the salary and is a decent offer). A Harden/Tatum duo with supporting players like Walker would be incredible. Huge payroll for the team, but incredible top end talent.