When thinking about DRM, remember that the company's ONLY purpose for existing is to make a profit.
Wrong, and completely wrong. The profit is a means to an end - even, especially, within a company perspective. Basically, the company needs to make a profit in order to be able to pay an interest on equity and loans, to invest into newer products/services, i.e. to invest in further growth (however you may define 'growth') and to have some money left for 'rainy days'.
Profit here is defined as the difference between revenue and costs - if revenue is higher, you have a profit, if it's lower you have a loss.
In any case, the profit is NOT the only purpose for a company's existence - it is a means to to exist, being able to re-invest and grow and pay an interest to those people who provided it with the capital it is using.
The assumption that companies' ONLY purpose of existence is profit is a fallacy and has been debunked already with Adam Smith.
Going back to the OP (an on-topic):
No, there is in fact not a really good reason for DRM from the consumer's perspective - DRM usually restricts the consumer's right to do whatever he/she wants with the product in question.
There is one potential use of DRM though - if, by using certain DRM techniques, you (as the producer) offer differentiated pricing, e.g.:
1) Watch/read/listen once - 0.19 USD
2) Watch/read/listen unlimited times - 0.99 USD
3) Unlimited watch/read/listen incl re-sale and lending to friends & family (used-sale) rights - 1.49 USD
4) Unlimited rights, except creating and distributing multiple copies for commercial purposes - 1.99 USD
In this case, it could be of interest even for consumers as the pricing is tiered based on the rights - again, it is important that the *pricing* matches the rights (the prices above are just examples)