Rusty garbage is most of what I work on. Bending lines and making flares isn't the problem.
IDK man. My garbage flaring tools "just work" too. I've got two under the seats of shitboxes which have done a fair number of parking lot brake line jobs on various people's cars . I am in no way limited by or forced to work around my tools on this.
Now, perhaps if I'd cut my teeth on the nice stuff I'd have picked up some bad habits I can't get away with on the cheap tools but I can't really imagine what those habits would be since even with the shit tools the whole process is pretty foolproof.
Before any of the usual scumbags show up to be scumbags and put words in my mouth, if I was doing a bunch of A/C sized stuff, stainless or thick wall hydraulic stuff in sizes above 1/2 I'd get a fancy tool.
I've used one. I don't own one. I don't feel the need to buy one because I'm not limited by my flaring tools. They're nice but not necessary for standard automotive use, which is why you don't see places like HF selling knockoffs.
OP should get a shitty 45deg flaring set and a cheap bender. When he needs to do 37deg hydraulic shit then he should consider a fancy flaring tool.