Chakra and Holism: As far as I understand the concept of ‘Holism’ is Hermetic and/or Germanic, not of Vedic or Tantric origin. Yes, Vedic/Tantric does not define reality in terms of parts/whole. It is a misconception (or modern conception) that Ayurveda, Yoga, Tantra is about Holism. There is ancient mantra in Isha Upanishad: ॐ पूर्णमदः पूर्णमिदं पूर्णात्पुर्णमुदच्यते पूर्णश्य पूर्णमादाय पूर्णमेवावशिष्यते – Om Puurnnam-Adah Puurnnam-Idam Puurnnaat-Purnnam-Udacyate Puurnnashya Puurnnam-Aadaaya Puurnnam-Eva-Avashissyate – “That is Purna (full, whole, complete, without parts, no-dual); This is also Purna; From Purna comes Purna, taking Purna from Purna, Purna Indeed Remains.” And the same is described in Tantric texts as metaphor of Indra’s Net of Jewels – (the net of infinite jewels, so arranged and interconnected that each of the jewel reflects all the other jewels in the net, and each reflection of jewel reflects all of the others, so on so forth into infinite regression). It is only now after discovery of fractals and holograms that we are able to describe the nature of reality that is described in Vedic/Tantric texts in modern terms.
In the context of trauma and illness, it means that any dysfunction is felt at all levels of living-being, although it may have its epi-center in a specific physical or emotional space, its impact will be felt unfolding in all aspects of the being (and universe), sooner or later. And according to Vedic/Tantric so should the treatment be. That is why the vedic saying – healing oneself is, healing the universe. Chakra are gates in subtle-body that lead to different levels (or fields, Sanskrit: ‘kshetra’) of reality and perceptions. The inner(chakra)work is to move the awareness in/out of different fields of perceptions/reality. And this may to come you as a surprise – the inner(chakra)work is done when one is free of all illness and trauma. Yes, classical tantra does not recommend doing inner(chakra)work if one is in pain and suffering from any kind of illness, physical or emotional. Because a suffering heart-mind-body does not have required inner-resources to do the inner(chakra)work and can lead to more suffering and pain. That is why first and foremost is to heal, body-senses-mind. That also why the first six of the eight steps in Patanjali’s yoga-sutra are for working with body-senses-mind. In fact, the goal of Ayurveda to support longevity is by healing body-senses-mind, so a person can live fully and do the inner-work. And hence, the classical Ayurvedic text does not mention chakra. Inner(chakra)work comes after when one does not need Ayurveda or medicine. Only when one has clear, free and open, heart-mind-body then they are ready for doing the inner(chakra)work.