to me it sounds like you are involved in local politics by growing medicine, etc. holding a banner to ask our rulers to please be less ruthless is maybe seen as political but i dont necessarily see how it'd be any more effective than voting.

shouting is definitely not my style either, and maybe if your friends really wanted you to come along, they're obliged to accommodate for non-shoutiness in their activist activities. If you run Food, Not Bombs or empathetic vegan outreach or similar, then it's usually really chill, and bringing homegrown plants is extremely appreciated.

i think it's good to break the bubble sometimes, as we can perhaps all see the danger of being too self-absorbed e.g. with mindfulness / wellness / health, but you are totally not wrong for not wanting to attend protests not colored in your vibe.