This is absolutely true, but it does have to be weighed against the performance benefits of something that doesn't require invoking an LLM to operate.
If the cost of updating some xPath things every now and then is relatively low - which I guess means "your target site is not actively & deliberately obfuscating their website specifically to stop people scraping it"), running a basic xPath scraper would be maybe multiple orders of magnitude more efficient.
Using LLMs to monitor the changes and generate new xPaths is an awesome idea though - it takes the expensive part of the process and (hopefully) automates it away, so you get the benefits of both worlds.
If the cost of updating some xPath things every now and then is relatively low - which I guess means "your target site is not actively & deliberately obfuscating their website specifically to stop people scraping it"), running a basic xPath scraper would be maybe multiple orders of magnitude more efficient.
Using LLMs to monitor the changes and generate new xPaths is an awesome idea though - it takes the expensive part of the process and (hopefully) automates it away, so you get the benefits of both worlds.