system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do longer Ethernet cables not have any loss or drop off in data transmission?

For example, the longer a fiber optic cable the more “insertion loss” it experiences which affects its transmission of data.

Why do Ethernet cables not experience this, and on the contrary seem to be just as strong at 500ft than it is at 5 ft?
gpt
The key is in your last line. "seem"

I did this type of cabling for years.  The rule of thumb was about 300 ft+- before r transmission loss.  That was from the manufacturer and industry standards.  Typically most cables are designed with enough headroom that going beyond the recommended length does not result in a noticeable loss right away. But with enough length it will become noticeable if you test it with the right equipment .  Also, usually the equipment sending or receiving the data has more effect on speed than the cable itself, but loss does occur.