Having a wet room installed

Share your ideas about the practical side of caring.
I wonder if the plumber isn't keen on the Japanese toilet notion because they are tricky to install and he lacks experience? Folk tend to recommend what is least effort and they are best at!

Just a thought. ??

(Also of course, they often don't like having their expert advice dismissed!)
Wee had wet room installed 6 years ago best thing ever, husband in wheelchair he transfers onto commode/ shower chair over toilet ,then I position him along side shower pull floor length shower curtain round and he can shower himself, take him into bedroom and he transfers onto towel on bed and I can help dry him. We had option of waist high folding shower screens ,these can be added any time.