Is data really secured in My Passport Password Protected Drive?

My question is about My Passport password as bellow:

When you attempt 5 wrong passwords, then you will have chance to erase the drive. I think this is not good as anyone if finds your drive can erase it. And if erased, then your data can be recovered by any strong Recovery Software. So I think the data is not secured. I don’t know what its erase method is, but I am afraid if anyone finds my drive (I may lose it), so they will recover my secret data.

Please help me what to do solving this problem

Erasing the drive means erasing the data.