Is this correct: don't apply for too much credit. THAT DEPENDS.

I will say most of the people that are reading these kinds of articles, have way too less credit instead of having too much credit. (Reading these kinds of articles means you are a very resposible person care about your credit history, credit score.)
What is too much credit? 50k? 100k? 200k?
We are talking about unsecured ones, credit card or credit line, not home equity loans or things like that.
The thumb up rule is, get AS MUCH AS YOU CAN. BUT, only get the ones that has good rate and term.
A big total credit room and long credit history will show the lender that, you are a VERY responsible person.
Here is how they read you: a person have big credit room, for a long time, and NEVER abuse it, yet.
So, lender will see you as a very low risk case, and be very willing to take your business.
Some background info, I know some people have 100k, 200k unsecured credit room. They don't have much asset or supre high salary. Just normal guys like you and me.