Do I really need a Gore-Tex jacket for hiking?

No. Across the reviewers we read, Gore-Tex (especially Pro) clearly outperforms cheaper laminates in sustained heavy rain and durability, but specialist hiking subreddit consensus is that 2.5-layer proprietary membranes from brands like The North Face, Columbia, and Outdoor Ventures are 'good enough' for most day hikes and weekend trips. Thru-hikers and alpine users get the most benefit from premium membranes.