Inertia versus pressure

[Jincdong]

Business English Lesson, Advanced Level

ESL/EFL Test #179 "Entrepreneurship", question 3

Initiating a new business involves considerable risk, as well as an effort to overcome all the ......... against innovative ideas.

(a) attitude
(b) inertia
(c) pressure
(d) protest

Business English Lesson, Advanced Level

ESL/EFL Test #179 "Entrepreneurship", answer 3

Initiating a new business involves considerable risk, as well as an effort to overcome all the inertia against innovative ideas.

Correct answer: (b) inertia
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Hello:
Why cannot we use the word pressure in this sentense?

Please help me!
jincdong

[Mister Micawber]

.
Although old or conservative people may be against change, such an attitude hardly exists in the world of commerce.

Attitude, pressure or protest against change, therefore is a very minor concern for the entrepreneur-- or no concern at all. On the other hand, inertia-- the simple indisposition to motion or exertion-- in such areas as re-tooling production, worker re-training, etc is a fact which the entrepreneur must seriously consided.
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Native English teacher at Mister Micawber's