Re: Security issues
"A) Most technical security issues are caused by Microsoft security holes."
I think you mean that a lot of technical security issues can be attirbuted to software that runs on Windows machines including within the Windows software.
"B) An even greater number of security issues are caused by social engineering or by employees making mistakes or up to nefarious activities, either out of incompetence, disgruntlement or out of a desire to defraud."
And such security issues will continue to exist and become potentially more apparent in a BYOD world where users continue to do all of the above plus fail to implement the necessary controls that exist on laptops and desktops which have anti-virus, firewall and malware software installed to minise those risks.
"BYOD is a security concern but generally not as bad as the above security concerns, the extra risk of BYOD is nowhere near as great as fixing the above would reduce risks."
Just not true, the issues in your point B continue to apply in the BYOD world.
"In fact if BYOD meant fewer MS boxes, then it might improve security. iPads and Androids are more secure than windows laptops or tablets "
The problem is that there is no evidence that fewer MS boxes would result. Data still needs to be stored, applications still need to be run, web servers and proxies are still required so why would someone running round with a fancy device they brought in impact on the number of MS boxes? Even in the device area Windows phones are available as is Surface, chances are that like the XBox these products will become more used rather than remaining at their low levels simply because companies will see them as easier to integrate and will therefore incentivise their use as BYOD rather than Apple or Android devices.
BYOD is a complex issue for companies and trying to make it an "easy" decision will simply create more problems down the line