Yes , I think it depends though on the chemical action more than the cleaning action , rinsing water through a carpet would not always rinse out drugs such as penicillin in Urine , whereas mill-kill would kill the active ingredients and remove the odour .
Obviously HWE followed by LM would be the most thorough option , but will most care homes pay , or will time/logistics allow? Eg , I do homes at night when My TM would not be acceptable due to noise.