Im not sure if you follow the „knockoff“ legos, but the quality is very close for several brands. I own several 5000+ piece sets and while there is the occasional mold issue, you get plenty of replacement parts, pay a third for it and don’t have to deal with all the random colors that Lego includes in the unseen parts of the builds. They are usually tighter compared to Legos, but since I don’t intend to take these sets apart often that’s not an issue.
Also some of these sets are official as well. Like the Cada AMG One with the license from Mercedes and Michelin, which is miles ahead in feature/price compared to LEGO technic offers.
I mean, you just described a straight downgrade over lego. I understand it suits your specific need, but it's not lego. It was intended to be taken apart
Also some of these sets are official as well. Like the Cada AMG One with the license from Mercedes and Michelin, which is miles ahead in feature/price compared to LEGO technic offers.