Westcott is not considered an expensive lighting company. There are many US and European brands whose similar products are more expensive. Westcott is US based, but Chinese made, so some common items may cost more than Chinese brands. However, they also design their own products, not simply relabel them. Those original designs are first to market, so obviously cost more than knock offs that come later.
However, the strobe kit I listed for you is actually an entry-level set at an entry-level price. Westcott does not make higher end strobes (although they had a 400ws model before). Where else can you get a good quality set of three monolights, two soft boxes, three stands, gels, barn door and a rolling case for $500 backed by a US company? A rolling case alone will cost $100, so the strobes were an outright steal. Yes, you can cobble together some generic brands for the same price, with no warranty and instructions in broken-English, but why would you want that?
I’m sponsored by a competitor to Westcott, so I would not have recommended them if they weren’t worthwhile. I’ve shot with many brands of strobes and have a storage room filled with expensive gear. In fact, I wouldn’t have commented on this thread if I hadn’t used the gear myself and been able to speak to the quality. Anyone on this forum can speculate about gear they don’t own. You can also ask 10 professionals how to shoot a product and get 10 different answers how to do it.
As for overthinking... OP should ask which product photographers he admires shoot with continous lighting? What percentage of product photographers in your intended field use continuous lighting? Once you ask these questions, you’ll begin to understand why. Then emulate the type of photographer you want to become and invest in the gear you can afford.