Mate, you're talking crap! All of the courses you've mentioned are requirements to work in Maritime Security, Bosiet is about the most non essential one thats required unless you're doing North Sea Oil platforms or such, along with SIA.
You tell me what Maritime company is going to take on someone that has no SSO, no Seamans book, no STCW 95. Have you ever been on the water yourself, do you even have any of these qualifications yourself.
I would advise anyone wanting to work in Maritime Security to gain STCW 95, SSO and at least a Seamans book, this book is like your passport but on water and gives you 40kg baggage when checking in at airports. Make it easier for both you and your potential employer by having these, also take a criminal records check with you, more and more companies are asking for this.