If you read the article, it should be pretty clear why it matters; "tech companies" are valued differently (because of their potential for giant profit margins

If you read the article, it should be pretty clear why it matters; "tech companies" are valued differently (because of their potential for giant profit margins and exponential growth), so a business can inflate its valuation/grab buckets of investor money by positioning itself as a tech company even though it doesn't meet any of the criteria that actually make tech companies good investments. Which is arguably somewhat unethical.