Harbor Freight is great for hand tools you'll use occasionally, or power tools you'll use rarely. There's a reason people who use those tools for a living shop elsewhere.
Yeah, if I were a professional, I wouldn't use HF power tools either. But we're talking about DIYers here, not pros. And even good-quality name-brand tools from Lowe's/HD are a better value than renting.
The only place I can see where renting a tool makes sense is for something pretty large, that costs at least $500. For instance, a ditch digger is something I would rent, not buy: it's big, needs maintenance, and probably costs several thousand dollars new. And it's not something I'd need to use much, probably only once. But power tool that costs $80? Just buy it. I'll come out way ahead buying it, using it, and then reselling it on Craigslist than renting it.
I have HF power tools, but there's something slightly off about each of them, whether that's a flimsy plastic body, a saw blade arbor that moves around, or whatever. I don't use any of them on even a monthly basis. If I did, I would upgrade. Everything my brother has borrowed for a job has quickly failed. He doesn't buy much at Harbor Freight.
I have a Craftsman cordless drill that has lasted forever; it predates the tiny b&w Makita drills all the contractors have been using for years now. Since the battery is old-fashioned dry cell rather than lithium, I just took it to Ellis Battery for a rebuild when it failed.
The HF socket wrenches and sockets I've used have been at least as good as any Craftsman competitor, even from over 20 years ago.
However, for chisels, if you're talking about for woodworking, that's something I doubt I would buy from HF. For proper woodworking, chisels have to be incredibly sharp and hold an edge, and that requires high-quality steel. I guess if you're just installing some door latch plates a HF chisel might be OK though, but I'd get something nice for doing any serious woodworking because having really sharp chisels is critical for quality work.