People change over time; so do their needs. Someone may only need the features of the toilet short-term.
Someone may initially only require the washing function, but may later require additional support, or help getting on and off the toilet, or lack physical strength and/or precision to accurately press a small button.
The flexibility of the automatic toilet, and its ability to be adapted over time to changing needs, if required, plays a part in the decision process. The toilet design itself can influence its compatibility with additional independent living aids- shower chairs, toilet lifts, support seats etc.