That's a bit of a reach to be honest. Nothing is suggesting the plan is to only 'develop young players and sell for profit' but rather develop them to use for ourselves. Well-timed players sales for top money to balance the books were very much a part of the club's business plan during the Abramovich era too and I don't expect that to change in the future either but it seems like something different is cooking here.
Boehly may well have some ambitions to operate somewhat like the Red Bull group but don't you think it would be on a much bigger scale if the starting point is Chelsea, a ready-made top club? Remember that we're talking about an initial £2.5bn investment to even buy the club whereas the RB clubs basically started from scratch with very small fanbase and little to no success on the pitch in the past. If their whole business plan was to just become a player factory they might as well have bought some smaller club to begin with, ie. of the stature of Brentford or something like that for a small fraction of the price.
Boehly's motivation seems to be running a club (or group of clubs) that are not only successful on the pitch but also self-sustaining too. Unlike Abramovich the new owners are not going to want to sink money into the project forever but there's also nothing pointing to the direction that they're only in it to gain dividends from the club either.
All along I've considered their plan for 'profiting' to be increasing the brand value of the club and you don't do that if you're only a farming factory of young players for other top clubs. Rebuilding the stadium and finding ways to increase other commercial revenues seems to be the main plan to make Chelsea in itself self-sustainable and this 'multi-club' nonsense just seems like a new way for the club to tap into the market for young players and try to avoid paying obscene transfer fees for players in a market that has gotten quite ridiculous lately. Even then I very much doubt the idea would be to completely stop buying ready-made top players to slot straight into the first team but rather this 'pathway' would just complement the normal squad building process.
It's definitely a long-term vision and we won't start seeing progress immediately so it's difficult to judge anything at this point. It may work out or it may not, but hiring the right people to run the club would be a good start. It's going to take a minimum of few years to start seeing whether this 'vision' comes to fruition or not but in the meanwhile the club are probably just going to aim to be competitive in the traditional way so basically buying players and using them in our first team straight away. Say what you want about our past summer's transfer window but at the very least the new owners showed ambition and willingness to invest money in the team. With a good DoF in place making the right signings should become a bit easier and if they decide to go through with this multi-club model it has the potential to be a very good thing for the club's success, even if I personally don't really agree with it for much of the reasons
@WeePat has stated on here before.