Why is mana regen being forced into the upcoming jungle items?

I'm confused as to why all of the smite upgrade options are being reworked to include the Hunter's Talisman (150% mana regen while in the jungle, plus the second half of the tooth/nail passive).

Will be forced to choose between spending gold on a stat they can't use or forgoing the smite upgrade? I understand that the community has a strong aversion to resourceless champions but regardless, it seems like poor design to force such a decision. Why is a manaless smite item upgrade not being provided? Smite utility and increased jungle experience gains should not be required to be tied to mana regeneration.

Edit - I should point out that the reverse is true as well, champs like etc really don't want to be forced into building lifesteal and it's silly that they will be, with the preseason rework.

Many of you are saying "it's the way things are now" but that's the whole point of (ideally) an improvement for the better. They've upped the smite upgrade item cost to 1050 from 850 and it would feel a hell of a lot better if you didn't have to build mana regen on or lifesteal on to get there. The ideal case would be offering the item as it is now (someone like would probably benefit from it quite a lot) and having additional build paths of it building out of one or the other (machete, talisman) and the price being adjusted to compensate either the lack of mana regen or lifesteal.