I read a lot of stuff in the threads of this forum,especially related to PhD,prospects after grad school,R&D work and so on,focused on PhD and R&D.Many people here give just general replies-vapidity without any concrete useful information...like bla-bla-bla 'don't get PhD just for career purposes'...ok,then what for?!...many use general phrases like 'many doors are open for Physics PhD holder',when they are asked about what their research is they don't explain anything more or less concrete...and so on and so forth...but there's a few really useful information among this stuff that a beginner could use in his life.So,I decided to ask the following that might be useful not only for me but also for others thinking about path choice: What is PhD needed for???Why should one pursue it if not for future career? 1)For academia career? Does it mean that it's impossible to publish any scientific article in some journal without PhD?Or is it impossible to do lecturing in universities without PhD,even if you're an engineer(BE or ME) who achieved something really cool in your field and could share your knowledge with an audience?So,an absence of PhD will intervene the world to know about your cool tech achievements?Or without PhD you will be isolated from the ambience where smart ideas might appear,where you could talk to Nobel Prize holders,work on the modernest equipment in high-tech laboratory,getting access to rare substances,weird microchips,and other terrific stuff.IMHO,the last point sounds to be the most reasonable for PhD.Tell me what is correct,please,I need to know. 2)For career in industry? But many people here constantly argue that you can get absolutely any job in industry without PhD...then why the hell do we need it? 3)For career in finances,investing,work in banks and similar? But wouldn't it be more reasonable to get a degree specialized in finance or at least,an MBA in this case?!Because it doesn't look logical even if you say 'grad school along with PhD give you smart analytical skills which you'll be using on Wall Street.'Pardon me,I suppose if one wanna develop his career in finance he will just get a degree in finance,not in physics,otherwise why the hell does he need it?It's ********! 4)For bisiness? But as many say here that for business start up and development you need totally different skills like management,ability to convince potential investors to give you money,staying on call for a long and other management stuff,then getting PhD doesn't seem to be attractive again.Then why??? Please,explain me,oh smart gurus,why did you spend years of your life on getting PhD(if it's not a secret you keep silence about)?Are you satisfied of that and don't regret?In which case would you advice people who didn't take this route yet to do the same?And if 'yes',then why?Thanks and bye.