as strong and fast as you might be, a wise ninja knows his greatest strength comes from the people who care for them

I was wondering "as… as you might be" refers to "even though you think you are strong.

And if I change "as strong as you might be" to " to "as strong as you can be", I’m not sure if the meaning completely changes.

Furthermore, can I use it like this?

As rich as you might think, the most important thing in life is to keep you healthy.

Thank you in advance!!!