Are the jumper cables in prebuilt kits any good?

This is the most consistent complaint in the data. tomsguide.com explicitly flags missing safety essentials in budget kits, and a walmart.com verified-purchase review of one low-cost kit reported cables catching fire during a jump attempt. Consensus on r/AskDad and r/askcarguys is to upgrade to heavier-gauge cables (4-6 gauge) or carry a portable jump pack rather than trusting the thin cables that ship in sub-$40 kits.