Many ayahuasca shamans are using exactly tobacco as a support function in ceremonies. So people using that are also believing that they are doing something more

Many ayahuasca shamans are using exactly tobacco as a support function in ceremonies. So people using that are also believing that they are doing something more profound than simply taking a drug. Not to start a discussion of what that means, but the difference between tobacco and aya which you pointed out to is not as big as you think.