Rainford said the workers did not want to strike because days off were very rare and people would rather spend the spare time with families.
Fellow E tū delegate Tanya Oomen said support workers were required to be available "at the drop of a hat".
"How can you do that if you have got children?" she said. "But we agree to it because we have a duty of care. If we don't turn up who else will?"
Tauranga support worker Fiona Robertson said it was hard trying to be in more than one place at once.
"I live in Te Puke and I cover Greerton, Pāpāmoa and Mount Maunganui. That is seven houses and two vocational - and they want me to be more flexible," she said.
"I have to remember all of the different medications at each of the houses... It can be emotionally draining."
IDEA Services chief operating officer Joan Cowan said considerable planning was undertaken to ensure enough staff were available to keep the people they support safe during Sunday's strikes.
The organisation was confident people were being supported naturally and remained committed to achieving a collective agreement for support workers, Cowan said.