Does a rhetorical question need a '?'

["Johan Hiemstra" <webmaster -at- techexams -dot- net>]

Hi all,

I stumbled on something that made me think and eventually doubt. Is a
question mark required in my rhetorical question below. The text is just a
draft btw...

"Physical access controls are the first line of defense. Why would a hacker
try to penetrate a firewall and crack authentication systems while he can
just walk into the company's building and steal an entire server instead.
Physical access controls should be in place to controlling access to office
buildings and other facilities, the rooms in it, as well as the hardware,
network media, and data storage media."

It's for an educational breakdown of certain common terms related to
physical security. I don't want to use actually questions as I think it's
sloppy/lazy writing to ask a questions just for the sake of being able to
provide an answer. In this case, the answer is not provided because it is or
will become obvious from the remaining text in the chapter. Word wants me to
put a '?' after 'instead', but I don't want a ? in my text. Can I leave it
out and consider it a style issue instead of a grammar/spelling error?

Thanks,
Johan


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