Context is everything! The word choice may seem obvious from a logical reasoning standpoint. Inaccessible can imply that the object is difficult or next to impossible for anyone to access such as the deepest depth of the ocean called Challenger Deep. A way to look at inaccessible as closed off to public. It is not impossible or too difficult for authorized persons to get access to the same place such a a live crime scene that is taped off. Only special people can get in. If you are not special or authorized you have no access to that place. I would say there is a noticeable difference.

I have edited the answer. However the answer implies pandas are bears as referenced. So the op has made a mistake saying it is referring to the wrong name.

Corrected spelling

@ Jeff C, yes I know many people lie which was my point. The people who don't work hard will still say they work hard to others. Perhaps they will come clean to you or a sibling they refuse to work hard. Most people will not get a mega phone and announce to the world they are lazy or their goal is to get over on otherr people for a living. The expression does not make the claim true because someone utters it. My answer expresses 95% or more probably literally don't work hard at all and they know it. Hence why the phrase means nothing when everyone does the same line.

If they overlap they are not literally meaningful. The phrases are embellishments only.

Why not erase the HAVE? Does the meaning change without HAVE?

I can't find a possible case where I would ever say I have graduated. I would say I just graduated or I graduated college 6 years ago , etc. I don't see why HAVE should be there at all.

First I never said this is how I say so it must be correct. Please reread my answer and do not assume things in someone else's words without even asking. I explained why the sentence used was improper