Can I heal without a bland diet?

My symptoms were major gas, nausea, loss of appetite and some gag sensitivity when eating. Since start of October I’ve cut out alcohol, spicy foods, vaping and daily smoking, though I still use a dry herb vaporiser a few times a month and have a cigarette once every 1-3 weeks.

I’ve definitely noticed improvements in my symptoms, but I’ve noticed people on here talking about bland diets and I’m wondering if I’m preventing better healing by not being strict and having a bland diet?