If the global Visanet does 3k tps, why would a crypto need a spec of 100k tps in the short or mid-term future? There isn't even a need to cover that many txs because those txs don't exist.
Microtransactions.
And 6 billion people who don't have credit cards now.
Visa has about 50% global market share. So double to 6k. Now multiply by 7 if you want to expand the market. That's already 42k/sec average rate (peak is likely much higher) and you haven't even touched microtransations.