If not, then the Buddha and the other human beings who established a new religion by claiming that they had a particular access to dharma (/God's will/etc.) are a fake.
But how to distinguish the case of the Buddha and of other extra-ordinary beings from that of cheats? The Mīmāṃsā arguments against the access to dharma through visualization or meditation seem quite strong, as they rely on the fact that what is "seen" is in fact only "remembered", and on the fact that sense-faculties have fixed boundaries and super-sensuous elements exceed them.
As for the first point, consider the following passage by Veṅkaṭanātha (Seśvaramīmāṃsā ad MS 1.1.4):
Out of visualisation it is not perception which arises, but rather only clearness of memory. In fact, the accumulation of mnestic traces (saṃskāra) can supply sharpness only to memory. Even when, for instance, a love-sick sees his [absent] beloved one, nothing additional to what has already been known appears [in his image of her].And the additional element appearing in "And on every tree I see Rāma, clothed with the skin of an antelope and a garment, with his arch, holding a noose in his hand like the Destroyer (Yāma)" (Rāmāyaṇa 3.37.1512) and similar [verses], is not directly perceivable, since it appears in a different way (i.e., as a tree, not as Rāma). What [is directly perceivable] is, instead, its external look (i.e., the tree). (That is, the fact that Rāma appears on every tree and in Yāma's garb is not directly perceived —through direct perception one would see trees as trees).
Do you see a different way to "save" Buddhism, Jainism, etc., while yet not accepting all sorts of claims about super-natural access to dharma, etc.?
On yogipratyakṣa (sense-perception of extra-sensory items, such as dharma), see this post (and the further list of links on its bottom).