GPT-4o (and the other top-tier models like Claude 3.5 Sonnet and Gemini 1.4 Pro) is massively more capable than models you can run on your own machine using Ollama - unless you can run something truly monstrous like Llama 3.1 405b, but that's requires 100GBs of GPU RAM which is very expensive.
I understand that if the web scraping activity has some ROI it is perfectly affordable. It is iust for fun it doesn't make sense but the article is already paying for a service and looking for a goal.