What are the Pali cannon references, if any, for the historical Buddha explicitly teaching and/or endorsing Kasiṇa (meditation of the type found in the Visuddhimagga or any type of Kasina meditations)?
The Kosala Sutta: The Kosalan is one example. So nothing wrong by using such kammaṭṭhāna, good householder, as certain included and preference of kind of 'hobby' is different from individual to individual.
And it's not wise to hold a 'I know better that the Elders' attitude, but much better and of benefit if approaching the Gems with devotion, respect, generosity and patient first. As else would just demerit, here and here after.