system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why don't laptops have a slot to clean fan dirt?

I just cleaned my laptop fan yesterday because the airflow was blocked and the CPU was overheating. Had to remove the complete keyboard and palmrest by unscrewing almost 25 screws before I got to the fan. Cleaning the fan was real quick; I could see the accumulated dirt. Just picked it up and threw it away.  

Why is there no slot to clean such dirt underneath the fan? A small opening like that of RAM modules could be unscrewed, compressed air could be blown or the dirt fibres could be picked and thrown in just under 5 minutes!
gpt
The more user-servicable you make a piece of electronics, the bulkier and less reliable it will be. People generally make their purchasing decision based on aesthetics or specs and not on the ease of maintenance. This is the same reason that iPhones don't have removable batteries.